Site 15C is a primitive boat-in campsite located along the 55-mile Au Sable River stretch in the Ausable Semi-Primitive North area, accessible only by canoe or kayak.

This rustic site offers no amenities (no water, toilets, or trash removal), requiring campers to be fully self-sufficient with pack-in/pack-out practices. Camping permits ($10/night) are required May 15–September 10 through Recreation.

gov; outside this season, camping is free but unmaintained.