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.