Northeast of the lake is Dewdney Peak (Hatzic Mountain) which forms the southmost endpoint of the Douglas Ranges.

Since these tributaries are intermittent, the water freshness and level of Hatzic Lake can vary seasonally.

BC Highway 7 and the mainline of the Canadian Pacific Railway cross its southern end, just south of the southernmost parts of Hatzic Island.

The lake water temperature and farm fertiliser run-off introduced via Scorey Creek has been blamed for invasive flowering rush and algal bloom issues, the latter of which has led to Fraser Health-imposed swimming bans.

[3][4] In 2019 the BC Government funded over a quarter million dollars for addressing invasive plant concerns in Hatzic Lake.