The periodic flow only exists after thaws or heavy rains.
In summer, Lake Firlej is a popular vacation spot.
[1] The area around the lake is forested to the south, and more populated on the north side.
The village of Firlej is situated on the north-west side of the lake.
Many species of fish live in the lake, including bream, roach, pike, zander, crucian carp, and eel.