The lake spans the towns of Salisbury and Leicester and has a surface area of 985 acres (3.98 km2).

Branbury State Park occupies 69 acres (28 hectares) of the eastern shore and offers a sandy beach, canoe rentals, and campsites.

[3] Point CounterPoint, a chamber music camp established in 1963, operates on the western shore of Lake Dunmore.

[5] Although a natural lake formed by glaciation, the water level is controlled by a small dam.

In addition, Sucker Brook is part of a hydroelectricity project connecting Silver Lake and Sugar Hill Reservoir via Sucker Brook and operated by Green Mountain Power.