Great Lakes Endurance

Event overview

Rock River Canyon is a trail running event in Munising, Michigan, held in June. The event offers two distances:

• 50K - out-and-back on the North Country Trail, about 31 miles, roughly 4,390 ft cumulative ascent and descent
• 27K - out-and-back, about 16.5 miles, 100% single track with a turnaround at the AuTrain aid station

The start and finish are at Valley Spur Lodge south of Munising. Entrant limit is 100 runners. All finishers who complete their registered course receive a commemorative award; podium awards are given to the top three men and women in each distance. Age-group awards are given for standard decade groups from 15-19 up to 70+.

Course and logistics

The 50K route includes about 26 miles of single track and about 5 miles of dirt forest road. There are six aid stations located approximately 4 to 5.4 miles apart (mile markers at roughly 4, 8.4, 12.8, 18.2, 22.6, and 27). Runners are required to carry a 20 oz water bottle or functional hydration system; volunteers will provide cold water, an electrolyte drink, energy gels, and electrolyte tablets at aid stations. Drop bags may be stored in a tent near the start/finish; items left on the island will be returned to the ferry boat store on the mainland. Dogs are allowed at the start/finish area but not on the course. Visit the organization's website for the most recent information.