The lake was created as a result of an earthquake in the early 18th century.
The name 'Sülüklügöl' translates literally to 'Leech Lake' due to the historical presence of leeches in the stagnant water.
Visible submerged tree trunks indicate the lake's origin as a previously dry, forested valley basin.
The water depth and clarity fluctuate significantly depending on seasonal rainfall and snowmelt.
The site acts as a geological record of local seismic history in the North Anatolian Fault zone.
Sülüklügöl, also known as Leech Lake Nature Park, is a tectonic lake situated in a deep valley within the Mudurnu district of Bolu. The lake formed after a major earthquake caused a landslide that blocked the local stream, submerging a forest of trees. Dead tree trunks remain visible protruding above the water surface, creating a distinct visual landscape. The surrounding area is characterized by dense coniferous forests dominated by fir and pine species. It is a designated protected area managed for ecotourism and controlled camping. The park encompasses a total area of approximately 809 hectares. Visitors access the lake via a rugged forest road that traverses the mountainous terrain of the Bolu province. The ecosystem supports various wildlife, including wild boar, deer, and diverse avian species.
The wooden viewing platforms along the shoreline that look out over the submerged tree stumps.
Bring waterproof footwear, as the trails around the lake are often muddy and uneven.
Pack all necessary food and supplies, as there are no commercial facilities or shops within the park boundaries.
Ensure your vehicle has high ground clearance to handle the unpaved forest access road.
Attempting to reach the lake during heavy winter snows or after intense autumn rains when the dirt road becomes impassable.
Road access is frequently restricted or hazardous during winter months due to heavy snowfall and ice.
Strictly follow 'Leave No Trace' principles; do not litter or disturb the natural habitat.
