Au Sable River Canoe Marathon

The Au Sable River Canoe Marathon — an annual 120-mile, non-stop canoe race from Grayling to Oscoda, held every summer since 1947 and known as "the world's toughest spectator race." Racers paddle through two nights down the Au Sable, finishing in Oscoda. This is an annual event, not a place: see our events calendar for date details and ausablecanoemarathon.net for registration and official information.