Things to Do in Bolu: Yedigoller, Abant and the Ottoman Towns

--- title: "Bolu travel guide: Yedigöller, Abant, two Ottoman towns and the crowd problem" description: "An honest guide to Bolu, Turkey: the truth about the Yedigöller road and its famous autumn, Abant and the other lakes, the timber towns of Mudurnu and Göynük, Kartalkaya, Bolu city and the Karacasu thermal springs, when to go and what to eat." city: "Bolu" lang: "en" ---

Bolu: the weekend that twenty million people default to

Everything about Bolu is explained by where it sits. It is roughly halfway along the motorway between Istanbul and Ankara, a couple of hours from either. That single fact is the province's greatest asset and its greatest problem at the same time. The asset is that nobody has to book leave to come here. You get in the car on a Saturday morning and you are standing in a fir forest before lunch. The problem is that a great many other people had exactly the same thought on exactly the same morning.

This is mountain country. Forested ridges drop north towards the Black Sea, the Köroğlu range rises to the south, and the town sits on the plain between them. The lakes are scattered through those mountains: some formed by landslides, some dammed. The most famous of them is Yedigöller, and for most visitors it is the entire reason for the trip. When the beech and hornbeam turn in autumn, the result is probably the most photographed stretch of forest in Turkey.

Who is it for? People with a car who accept the driving. Bolu is not a place you walk from a single base. Yedigöller and Göynük are more than 150 road kilometres apart with mountains in between. It works if you want forest, walking and good food. It runs thin if you came for museums and monuments, because the weight of this province is outdoors.

The most common mistake is setting off for Yedigöller on a Saturday morning in October. The reasoning is sound. You want the colour, and you have picked the right fortnight. The trouble is that so has everyone else, and the road is a narrow forest road. What you get is a queue of cars that does not move and a day spent looking for somewhere to park. Come back on a Tuesday and it is a different place entirely. In Bolu, the calendar matters more than the itinerary.

Quick answer

Bolu is a mountain province you drive, and it is worth roughly twice as much on a weekday as it is on a Saturday.

• The route: Yedigöller, then Abant and the lakes near town, then Mudurnu and Göynük, and Kartalkaya if it is winter.
• Best time: mid-October to early November for colour, spring for quiet, winter for skiing.
• Crowds: weekends and the autumn holidays genuinely fill up. Going midweek is not a nice-to-have here, it is the whole trick.
• The Yedigöller road changes with the season and the Bolu approach can close in winter. Verify officially before you set off.

1. Yedigöller Millî Parkı

The one place that markets the entire province by itself. Seven lakes, formed when landslides blocked the valley, scattered through beech and hornbeam forest. None is large; some you can walk around in a few minutes. The effect has nothing to do with scale and everything to do with the contrast between still water and turning leaf. In autumn the canopy goes yellow to red and the surface of each lake doubles it. If you have ever seen a photograph of a Turkish forest, the odds are you were looking at this.

The park lies about 42 kilometres north of Bolu town. That sounds close. It is not, because the road is a mountain road and the time has nothing to do with the distance. Inside, a driveable loop links the lakes.

The honest note: the park itself is a quiet place, but it is not quiet on an October weekend. The best two or three weeks for colour are the busiest two or three weeks of the year. Entry conditions, opening hours and vehicle access can change, so verify officially.

2. Büyükgöl (Yedigöller)

The largest lake, and where most visits actually begin. It is the one closest to the car parks, which is exactly why the crowd concentrates here. There are boardwalks and a flat path around the water, easy enough with children.

The reason it gets its own entry is practical. Most people drive in, take the same frame from the same stretch of shore, and drive out. But there are seven lakes and the others are a few hundred metres away. The moment you get a hundred paces from the car park the number of people drops, because most of the crowd never strays far from the vehicle. That rule holds across the whole province, and nowhere is it more obvious than here.

The colour of the water shifts with the light. Early, while the forest shadow still lies across it, the surface is dark and completely still. By afternoon it flattens out. If you are after photographs, aim for the morning. That is also the hour before the queue forms, which solves two problems with one alarm.

3. Abant Gölü

What separates Abant from Yedigöller is age. People have been coming here to get out of the city since Ottoman times, so the crowd is not a recent arrival. It has always been part of what this place is. The lake sits above 1,300 metres in fir forest, with a flat path that goes the whole way round.

Walking that loop takes about two hours and is one of the best things to do in the province. There are horses and carriages, and bikes to rent. But walking is how you understand Abant, because the character of the shore keeps changing: forest coming down to the water on one side, meadow opening out on the other.

Let us be straight about it. On a weekend the shoreline is lined with people from end to end, and what you experience is closer to a park than a lake. Midweek the same place is close to silent. Abant belongs to Mudurnu district, about 35 kilometres from town. Do not try to combine it with Yedigöller in one day. They are opposite directions.

4. Abant Gölü Millî Parkı

The protected area around the lake is a great deal bigger than the lake circuit, and most visitors leave without registering that it exists. This is where the fir forest, the stream beds and the paths climbing the slopes are.

Here is the value. The shoreline is the crowded face of Bolu and the forest behind it is the real one. Leave the water, walk uphill for half an hour, and the noise simply stops. Fir forest of this kind is not found everywhere in Turkey. It belongs to the mountains of the northwest, and Abant is one of the easiest places to stand in it. The trees are tall, the understorey is open, and the light filters down from a long way up.

The paths are marked but not equally maintained. Stream crossings run wet after snowmelt and the mud in spring is serious. If you are planning a long walk, verify conditions officially and plan to be back before the light goes. The altitude keeps this cool even in August.

5. Gölcük Gölü

The forest lake nearest to Bolu town, which is precisely why it is where locals default to for a walk. It is small. Half an hour takes you round it. Pine and fir stand close to the shore and there are timber walkways at the edge.

Set your expectations properly. Gölcük is not on the scale of Yedigöller or Abant, and it disappoints anyone who treats it as though it were. Its job is different. It lets you get into the forest without committing to a long drive, which is useful when you are filling a day in Bolu. It is close enough that you can leave after breakfast and be back before noon.

It fills up at weekends and on public holidays too, and being close to town it is one of the first places to do so. This is a lake with a strong picnic culture. If you want silence, come on a weekday morning, otherwise expect barbecue smoke and music. Depending on what you came for, that may not be a bad thing at all.

6. Gölköy Baraj Gölü

A reservoir west of town. It makes no claims and does not need to. You come here to walk rather than look at anything: a flat path by the water, the hills of Bolu behind it, good light late in the day.

It is on this list because most visitors spend an evening in the town centre and there is not much to do in the town centre. Gölköy fills that gap. It is a few kilometres out, under fifteen minutes by car. Being a reservoir, the water level swings by year and season, and the shoreline sometimes sits well back from where you expect it.

What you find here is a local scene: people from Bolu out walking, someone trying to fish, others sitting out the cool of the evening. It is not a tourist site and that is the point. There is room even on a Saturday, because nobody from out of town puts it on a list. If you would rather be in Bolu than tour Bolu, give this half an hour at the end of a day.

7. Sünnet Gölü

A small lake in Göynük district, roughly 27 kilometres east of the town centre at 820 metres. Pine forest runs right down to the shore and the lake returns the trees to you unbroken.

The value of Sünnet Gölü in Bolu is comparative. You get something close to what Abant offers without what Abant costs you in people. The reason is simple: it is far. For anyone driving from Istanbul or Ankara, Abant is more or less on the way, while Sünnet needs a deliberate detour, and that detour filters out most of the traffic. The lake covers around 18 hectares and reaches 22 metres deep.

There is a short path around it and places to sit. It is a good half-day stop rather than a full one. If you are doing Göynük it slots into the same day easily, and in fact the two make a natural pair: timber houses in the morning, the lake in the afternoon. Road conditions change in winter, so check before you go.

8. Mudurnu

About 52 kilometres from Bolu town. Mudurnu is an Ottoman town, and I mean that as a fact rather than a pitch: it holds over 200 registered houses of architectural value and around 20 religious and cultural buildings. In 2014 it entered UNESCO's tentative World Heritage list as the historic Ahi town of Mudurnu; in 2018 it joined Cittaslow.

The town grew as a trading centre on the Silk Road, and that is why it looks the way it does. Timber houses climb the slopes, the market sits at the bottom, and narrow lanes work up from it. The Yıldırım Bayezid mosque dates to 1374 and the Kanuni Sultan Süleyman mosque to 1546.

Do not arrive expecting Şirince or Safranbolu. This is not a town restored and put behind glass. Some houses are worn, some are still lived in, and the market is still the town's own rather than a shopping street for visitors. For some people that is a shortcoming. For others it is the entire reason to come. Half a day covers it, and the work is walking the lanes.

9. Göynük (Bolu)

First, clear up a confusion. There are two places called Göynük. One is in Antalya, near Kemer, a coastal resort known for its canyon. This is not that one. This Göynük is in Bolu, in the far southwest of the province, about 95 kilometres from town, and it is nowhere near the sea. Searches mix the two up constantly. Make sure you know which one you are reading about.

Bolu's Göynük is Mudurnu's sibling. Same logic: timber Ottoman houses stacked up a hillside, a market below, protected urban status. The district has 158 registered examples of civil architecture, including 137 historic houses and 21 mosques. The tomb of Akşemseddin is here, and it is the town's centre of gravity.

Are both worth doing? If you have the time, yes, because they are not the same. Mudurnu is tidier and takes more visitors. Göynük is further out, quieter, less polished. If you are squeezed, pick one: Mudurnu is the easier day, Göynük the emptier one. Sünnet Gölü is on the Göynük side, and the two fit one day.

10. Kartalkaya Kayak Merkezi

In the Köroğlu mountains on the Seben side, at around 2,000 metres. Kartalkaya exists for the same reason the rest of Bolu does: there is no other ski resort this close to Istanbul and Ankara. You can drive up from either, and that fills the place regardless of how the pistes are running.

The resort was built inside pine forest, which is not the usual picture. At most ski areas you are above the treeline. The season generally runs December to April, though that is not the same every year and the snow calendar has shifted recently.

Here is where I have to be honest with you. The number of runs, the state of the lifts, the pass arrangements and the accommodation all change year to year. I am not going to give you figures, because any figure I give will be wrong by the time you read it. Check the resort's own official source for piste and road conditions before you drive up. It is open in summer too, but then it is simply a mountain hotel district.

11. Bolu İl Müzesi

A small museum in the town centre with a clear job to do. There is Bithynia underneath Bolu. The Romans called the place Claudiopolis, and the modern name is thought to come from "polis". So this town beside a motorway is in fact an ancient settlement, and the museum is the only place that pulls that together.

Why go? Because it is not clear where else in Bolu you would see any of it. The centre is largely modern and walking its streets tells you nothing about the two thousand years underneath. The museum brings the finds, the inscriptions and the ethnography of the region into one room. An hour is enough.

Expectation check: this is not a large museum and I will not pretend it is. But people come to Bolu, do the lakes, and leave without encountering the history of the province, and that is a gap worth closing. It is the right stop for a wet day, or the morning before you drive to Yedigöller. Opening days and entry conditions change, so verify officially.

12. Karacasu kaplıcaları

A few kilometres south of Bolu town centre, in the Karacasu area. This is the thermal face of the province, and it is the part nobody talks about. There are hot springs here and facilities have grown up around them.

Let me say this plainly. Quality and character vary enormously from one establishment to another. Some are serious and some are not, and I will not name any. Prices, hours and services shift constantly, so research it yourself and confirm before you go. Thermal tourism is an uneven business in Turkey and Bolu has not settled into it the way Afyon or Yalova have.

I have kept it on the list for seasonal reasons. After a full day in the snow at Kartalkaya, or after eight hours on the Yedigöller road in autumn, getting into hot water is genuinely worth it. It is not a destination. It is a solution at the end of a day. Being this close to the centre makes it easy to fold in.

13. Musa Paşa Camii

A mosque inside Karacasu, standing at the same spot as the thermal area. It is a small building and it does not justify a drive on its own, but if you are already there for the springs it is a few minutes.

The interest is in this. The land around Bolu town is largely new now and buildings of this kind are thin on the ground. Karacasu was a separate settlement before the town spread out to meet it, and the mosque is the trace of that. A settlement next to a hot spring is no accident. People came for the water, and the mosque went up at the middle of what they built. You can still see the two side by side and read the connection.

Do not expect architectural ambition. It is a plain, provincial-scale mosque with no complex around it and no showy facade. It may not be open outside prayer times, in which case look from outside and move on. You will not have lost much. Five minutes after the thermal stop.

14. Köroğlu Dağları

Approach from the Kıbrıscık side and a different Bolu appears. Say the name of this province and people think forest and lakes. But south of all that, high in the Köroğlu range, the trees run out and upland begins. Rock, grass, sky, and almost nobody.

The reason to come is the contrast. Yedigöller and Abant are closed in, green, dense. This is open and empty. Anyone complaining about Bolu's crowd problem should be pointed in exactly this direction. The Köroğlu range is also the ridge Kartalkaya sits on, so you are looking at the summer version of the mountain you ski in winter.

A warning is due. This is a region rather than a viewpoint. The roads to the high ground are narrow and seasonal; snow arrives early and leaves late. If you are going alone, plan for stretches with no phone signal. Verify weather and road conditions officially in advance, start with a full tank, and leave yourself margin on the daylight.

15. Şahbazlar Şelalesi

In Mengen, inside forest. The waterfall is not big, but where it sits is good: a spot away from the road that you reach on foot through the trees.

Flow decides everything here. In spring, while the snowmelt is still running, it comes down with force and is worth the trip. By late August, most years, it thins out to a wet rock face. This is the standard problem with waterfalls of this size in Turkey, and photographs always show them at their fullest. Think about the season before you commit.

I would want Mengen on this list for a different reason anyway. This district is where Turkey's cooks come from, and it is the actual source of the province's culinary reputation. The waterfall is a pretext for going there, which is the best kind of pretext. If you are approaching Yedigöller from the Yeniçağa and Mengen side you are already in this area, so it costs you no detour. The walk is short, though the path gets slippery when wet.

16. Keçikalesi

A castle ruin on a rock outcrop in Gerede, at the eastern end of the province. Honestly, it is hard to justify the drive for this alone. But if you are coming from Ankara, or stopping in Gerede anyway, this is the most tangible piece of history in Bolu.

What survives is limited: traces of wall, sections showing how the rock itself was turned into a defence, and a position with command over everything around it. That last part is what you actually look at in a castle. A castle is the site chosen more than the stones remaining. From up here you see the pass road on the Gerede side, and why anyone built here becomes obvious. The road was being watched.

As for a castle in Bolu town, essentially nothing is left. Traces of the old walls are said to survive north of the centre, but that is not a place you visit. Do not set out looking for Bolu Kalesi. The province's visible castle is this one. The climb is short but the footing is uneven.

Getting to Yedigöller

This is the most important section in the guide, and it needs to be honest, because what is online is both dated and contradictory.

The direct road from Bolu town to Yedigöller is about 42 kilometres. Do not look at that number and budget half an hour. It is a narrow, winding forest road. For many years a substantial part of it was stabilised surface, meaning unpaved, and it was a standing complaint. Around 2015 the route was improved and much of the unpaved section was asphalted; reports at the time said the drive dropped from an hour and a half or two hours to forty or fifty minutes. Against that, some sources still describe close to thirty kilometres of stabilised surface on both approaches, and say the final kilometres near the park entrance are stone-paved rather than asphalt.

So the clear answer is this: I cannot tell you the current state of that road, and you should be sceptical of anyone who says they can. The sources disagree and each winter changes the picture again. Before you set off, confirm the road and the park status with an official source: the Bolu governorate, the forestry and national parks authority, or the highways authority. That is the single most important sentence in this guide.

The second route runs via Yeniçağa, Mengen and Yazıcık. When snow closes the Bolu approach in winter, this is the only way in. It is longer but more dependable. If you are coming in winter, make it your default.

On season: the peak of the colour is usually a few weeks between mid-October and early November, and the date moves every year with the temperature. Too early and it is green, too late and you are looking at bare branches.

On crowds: those two or three weeks are the busiest of the year and the road is narrow. Narrow road plus heavy traffic plus slow driving equals a queue. Driving to Yedigöller on a Saturday in October can mean spending the day in the car. Going midweek is the most practical advice in this guide. Tuesday or Wednesday, leave early. Same road, same colour, no queue.

The crowd problem

There is no point tiptoeing around this. Bolu sits within a two-hour drive of roughly twenty million people and you can see the consequences.

Midweek, Bolu is a quiet mountain province. You can walk the shore at Abant and pass hardly anyone. You can find somewhere to sit at Gölcük. On Friday evening that starts to change, and by Saturday lunchtime it is a different place: full car parks, full lakeshores, queues on the roads.

Autumn multiplies it. A weekend in October means two effects stacking: the normal weekend load plus the extra traffic that came for the colour. For a few weeks a year the province runs over capacity.

What can you do? Going midweek is the most effective move by a distance. Getting up early is the second; being somewhere at eight in the morning is a completely different experience from being there at eleven. Getting away from the headline sites works too. Sünnet Gölü, the Köroğlu high ground, the Mengen side and Gerede all give you room even on a Saturday.

I am not presenting this as a defect. Bolu is valuable because it is accessible, and it is crowded because it is accessible. You cannot separate the two. But you can skip most of the crowded half by picking the right dates.

Getting there

Bolu sits on the Istanbul-Ankara motorway (O-4/TEM), and in practice most people arrive by car. There are tolls and tunnels on the route; check an official source for the current arrangements.

Buses run and they drop you in the town centre. But moving around the province without a car is hard. Yedigöller, Abant, Kartalkaya and Göynük are all in different directions from town and none is reliably connected by public transport. Seasonal shuttles to Abant and Kartalkaya sometimes run; confirm before you travel.

Distances inside the province are deceptive. Yedigöller and Göynük look close on a map but are more than 150 kilometres apart by road, because there are mountains in between. Better to split the province: north (Yedigöller, Mengen), southwest (Abant, Mudurnu, Göynük, Sünnet) and southeast (Kartalkaya, Köroğlu).

The nearest airports are Ankara and Istanbul. Bolu has no scheduled air service of its own.

When to go

Autumn. The best-known reason to come is the colour, and it generally falls in the few weeks between mid-October and early November. Yedigöller and Abant are at their best then. That is also the busiest stretch of the year, so you take both together. If you can travel midweek, autumn wins easily.

Winter. The Kartalkaya season usually runs December to April, but the snow calendar is not the same every year. The Bolu-side road to Yedigöller can close, pushing access round to the Yeniçağa and Mengen route. Do not turn up without a plan. Road status decides your day.

Spring. The most underrated season. The waterfalls run full, the lakes come up, and there is no crowd. In exchange you get mud, and there may still be snow on the high ground. Late April to June is the best window for anyone who wants Bolu empty.

Summer. Bolu is cool in summer and that alone pulls a crowd escaping the heat. The scenery is at its weakest: green everywhere but uniform, and the waterfalls thin. On the other hand, the Köroğlu high ground is only comfortable in summer.

What to eat

Bolu's culinary reputation is old and it is real. Its centre is Mengen district, known as the place that produces Turkey's cooks, and that is not a slogan but a tradition running through generations. From the Ottoman palace kitchens to the hotels of today, cooks from Mengen have been in the middle of it.

What that means for a visitor is limited but genuine: food gets taken seriously here. The large service areas on the motorway are a separate category and do not represent the province at all. Get off the highway and into the districts.

Trout is the most consistent thing on the menu. Trout farms are common around the mountain streams and the lakes, and the fish is local. It is cooked simply, grilled or pan-fried, with no decoration and no need for any.

Meat dishes and baking are the other strength. Dried bean production is a local industry in Göynük and beans are taken seriously as a dish there; apricot preserve comes from the same district. I am not naming places, because businesses change. Look for what is local, get away from the motorway, and start with the trout.

Frequently asked questions

**Which month should I go to Yedigöller?** The few weeks between mid-October and early November for the colour, though the date shifts each year with the weather. If you want to dodge the crowd, go midweek within that window. In winter the Bolu-side road can close and access moves to the Yeniçağa-Mengen-Yazıcık route.

**Is the Yedigöller road bad? Can I drive a normal car?** The road was unpaved for years and much of it was asphalted around 2015. But sources contradict each other: some still describe stabilised sections on the approaches and stone paving for the last kilometres before the park entrance. Verify the current condition with an official source before you set off.

**Can I see Bolu in a day?** A day gets you one direction: Yedigöller, or the Abant area, or Mudurnu and Göynük. Yedigöller to Göynük is over 150 kilometres by road. Two days gives you two sides of the province.

**Is the Göynük in Bolu the same as the one in Antalya?** No. The Göynük in this guide is in southwest Bolu, about 95 kilometres from town, known for its timber Ottoman houses. The Göynük in Antalya is a coastal resort near Kemer. They have nothing to do with each other.

**Can I do Bolu without a car?** It is hard. Buses reach the town centre, but Yedigöller, Abant, Kartalkaya and Göynük lie in different directions with no regular public transport. Seasonal shuttles to Abant and Kartalkaya sometimes run; confirm before you travel.

**Abant or Yedigöller, if I have to pick one?** Yedigöller in autumn, and if you are after photographs, because that is where the colour is. Abant if you want to walk and have an easy day; it is closer to town and the drive is simpler. The fix for both is the same: go midweek.