Bolu sits on the TEM motorway between Istanbul and Ankara, making it one of Turkey’s most accessible nature destinations. The Köroğlu Mountains to the north contain glacially carved lake basins; the forests are among the most intact temperate broadleaf forests in Turkey. Bolu is also famous for its chefs — many of Turkey’s best restaurant cooks trace their roots to Bolu province.
Two UNESCO-listed Cittaslow towns — Mudurnu and Göynük — preserve Ottoman-era timber architecture and slow-life traditions. Both are under 30 km from the motorway.
- Region
- Western Black Sea / Köroğlu Mountains
- Distance
- 220 km from Istanbul, 190 km from Ankara
- Cittaslow towns
- Mudurnu + Göynük (two of Turkey's first)
- Known for
- Abant Lake, Yedigöller, Kartalkaya ski, chefs
Abant Lake National Park
Abant Lake, at 1,328 m altitude, is a glacially formed cirque lake surrounded by dense beech, oak and pine forest. The national park circuit trail (7 km, flat) loops the entire lake — one of Turkey’s most pleasant and accessible nature walks. The lake reflects the forest, creating the photographs that define Bolu province’s image. The nearby Abant Palace hotel (historic government guesthouse) is open to the public. Autumn (October) is peak season when the beech forest turns gold-red; expect crowds on autumn weekends.
Yedigöller (Seven Lakes)
Yedigöller National Park, 85 km north of Bolu city, contains seven interconnected lakes cascading down a forested valley — each of a different emerald shade depending on depth and algae. The lakes are connected by short wooden boardwalks and footpaths; the full circuit takes 2–3 hours. The forest cover (oak, hornbeam, lime, beech, ash) is one of Turkey’s finest temperate woodland examples. Entry is by shuttle bus from Narlıdere village (cars not permitted on the main access road in peak season).
Kartalkaya Ski Resort
Kartalkaya, at 1,800–2,200 m on the Köroğlu plateau, is Istanbul’s closest ski resort — 3.5 hours by car on the TEM motorway. The resort has 17 runs (longest 3 km), 8 lifts and reliable December–March snowfall. Several large hotels operate on-piste. For weekend skiing from Istanbul without flying, Kartalkaya is the standard answer.
Mudurnu & Göynük
Mudurnu and Göynükare both certified Cittaslow (Slow City) members — Ottoman timber-frame towns preserving traditional building techniques. Mudurnu has the 14th-century Yıldırım Beyazıt Külliyesi (mosque, medrese and hamam complex) and a grid of restored konaks. Göynük is even smaller and quieter; its canyon (Göynük Kanyonu) offers easy trekking through a narrow limestone gorge — one of western Turkey’s best half-day hikes, suitable for families.
Bolu in pictures
Frequently asked questions
Bolu
3Drive on the TEM motorway (E80), exit at Bolu — 220 km, approximately 2.5–3 hours without traffic. Abant Lake is 35 km south of the motorway; Yedigöller is 85 km north. Istanbul buses stop at Bolu city (2.5 hrs). Bolu doesn't have an airport — the motorway route is the practical option.
Autumn (mid-October) is peak season for the fiery beech forest colours — expect weekend crowds. Spring (April–May) has wildflowers and fewer visitors. Summer is pleasant but very busy. Winter (December–March) is Kartalkaya ski season. Yedigöller is most dramatic in October.
Yes — Abant Lake or Yedigöller as a day trip is standard. Leave Istanbul by 7 am, reach Abant by 10, walk the circuit (2 hrs), lunch, return by 7 pm. Yedigöller is 85 km further north; doing both in one day is rushed. Kartalkaya needs an overnight to make the drive worthwhile.