It is the only lake in the Bohemian Forest that drains into the Black Sea basin via the Danube.
The water clarity is notably high, though the lake is acidic and supports limited aquatic life.
The depression was carved by a glacier during the last ice age, leaving behind a 300-meter-high moraine wall.
The lake is geographically separated from the neighboring Černé jezero by a narrow ridge of the Jezerní hora mountain.
Its name, 'Devil's Lake,' originates from regional folklore stories about the devil carrying a stone that formed the basin.
Čertovo jezero, located in the Šumava National Park, is the largest glacial lake in the Czech Republic. It sits at an elevation of 1,030 meters on the southeastern slope of the Jezerní hora mountain. The lake covers an area of 10.3 hectares with a maximum depth of 36.5 meters. Dense coniferous forests surround the water, which is fed by subterranean springs and rainfall. The lake drains into the Jezerní potok, eventually contributing to the Danube watershed. It is a strictly protected nature reserve, prohibiting swimming, camping, and fires. Access is restricted to marked hiking trails to preserve the local ecosystem. The lake serves as a central hub for various regional trekking routes.
The elevated viewing point along the red-marked trail overlooking the lake basin.
Bring sturdy, waterproof hiking boots as trails can be rocky and muddy.
Carry all waste back with you, as there are no bins along the hiking paths.
Start your hike early to avoid the peak mid-day crowds, especially during summer weekends.
Attempting to walk off-trail or enter the water, as rangers strictly enforce nature reserve regulations.
Trails may be restricted or closed during winter months due to heavy snow accumulation.
Strictly remain on marked trails; do not swim, paddle, or touch the water to protect the sensitive ecosystem.
