At its south-eastern end it is linked to the neighbouring Llyn Peris (which forms the lower reservoir of the Dinorwig power station).

Whilst kayaking, rowing and sailing are permitted on the lake, powered craft require permission to use it.

Padarn Country Park is located on the northern flank of the lake, including Coed Allt Wen, a rare and ancient sessile oak woodland.

A lone birch tree grows just off the south western shore, a short walk from the Llanberis Water Sports Centre carpark.

In 1993, an RAF Westland Wessex helicopter suffered a rotor failure, and crashed into the lake, killing three Air Training Corps Cadets, Christopher Bailey (15) from Horwich, Mark Oakden (16) and Amanda Whitehead (17) from Bury, and injuring one.