The lake is of glacial origin and is approximately 30,000 years old.
It is the only habitat in the world for the Pereslavl vendace (Coregonus albula pereslavicus), a relic fish species.
The water basin is shaped like a bowl, resulting in a distinct gradient of depth from the shore.
Peter the Great used the lake to build his first experimental fleet, which later became the foundation of the Russian Navy.
The park contains the 'Blue Stone', a large boulder of glacial origin that was traditionally venerated by local pagan tribes.
The lake level is controlled by the Nerl River, which connects it to the wider drainage system.
The park is home to over 200 species of birds, including several rare species listed in the Russian Red Data Book.
The unique microclimate around the lake supports flora not typically found in the surrounding taiga forest.
Lake Pleshcheyevo is a glacial-origin lake and protected national park located in the Yaroslavl Oblast, known for its unique hydrological regime and high biodiversity. The lake covers an area of approximately 51 square kilometers and reaches a maximum depth of 25 meters. It serves as a critical habitat for the endangered vendace, a type of freshwater whitefish. The park encompasses the lake and its surrounding landscape, featuring diverse ecosystems including wetlands, forests, and peat bogs. The area is historically significant as it served as the site for Peter the Great’s 'toy flotilla' in the late 17th century. The national park operates to preserve the lake's ecosystem while facilitating scientific research and regulated recreational activities. Visitors can access designated ecological trails and bird-watching stations. The park management enforces strict rules regarding campfire use and motorboat access to protect the water quality. It remains a focal point for ornithological study due to the variety of migratory bird species frequenting the lake basin.
The shoreline near the Alexander Hill (Alexandrova Gora) offers a panoramic view of the lake and the historic town.
Obtain a visitor permit from the park administration office before entering designated ecological zones.
Bring binoculars for bird watching, especially during spring and autumn migration periods.
Use only marked parking areas and designated camping spots to avoid damaging protected soil layers.
Do not attempt to walk on the ice during winter as the lake has dangerous, unpredictable thermal springs; avoid swimming in non-designated areas.
Park access remains open year-round, but specific ecological trails may close during wet seasons or for maintenance.
Strict prohibition on open fires outside marked areas; motorboats are restricted in spawning zones.
