Great Lakes Endurance

Munising, United States • 6 Jun 2026

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.

Race information

50 km
415 m+
50k
27 km
414 m+
27k
Visit the organization's website for the most recent information.
Trail runs nearby

Experience the scenic Rock River Canyon trail runs in Munising on June 6, 2026 with 50K and 27K routes through rugged single track and forest roads. Field is limited to 100 runners and all finishers earn a custom medallion.

Run Grand Island trails off Munising, Michigan in 50K, marathon or half marathon through sandy beaches, Trout Bay and dramatic sandstone cliffs. Field capped at 500; entry includes ferry and shuttle. Participants must carry refillable water..