Crotch Lake has two public boat ramps maintained by North Frontenac Township — one at the north end of the lake and one at the south.

The north ramp is reached by turning south onto South Bush Road off Road 509, near the village of Ompah, and following it to the lake. The south ramp is accessed via Ardoch Road (Crotch Lake Access Road), off Road 509.

Both launch areas offer ample parking, though the access roads are narrow and winding. The ramps serve paddlers and motorboaters heading out onto Crotch Lake, a roughly 5,000-acre, nine-mile-long lake within the North Frontenac Parklands.

A permit is required to use the 72 maintained campsites on the lake, most of which are accessible only by watercraft.