Crotch Lake has two boat ramps maintained by North Frontenac Township, serving one of the largest and most accessible lakes in the North Frontenac Parklands.

The south-end ramp is located off Ardoch Road at 1217 Crotch Lake Access Road, while the north-end ramp sits off Road 509 near the village of Ompah via South Bush Road. A road permit is required to reach both launches.

Both ramps offer ample parking, though the access roads are narrow and winding. The launches serve paddlers and motorboat campers heading out to the lake's 72 maintained campsites, the majority of which are accessible only by water.

A day-use pass can be purchased at the south-end access point.