McManus Lake Access Point (#21) is a backcountry canoe access point in Algonquin Provincial Park, Ontario. To reach it, travel 6. 4 kilometres beyond the Sand Lake Gate, turn right (north), and continue 8. 3 kilometres to the south end of McManus Lake.

This access point functions primarily as a pick-up location for canoeists completing a descent of the Petawawa River from the Lake Travers Access Point.

Paddlers should note that travel below McManus Lake on the Petawawa River is prohibited due to a military artillery range, and upstream travel becomes difficult beyond Whitson Lake. Backcountry permits are required for use.