Grand Island Trail Marathon

Grand Island Trail Runs : Grand Island, MI (July 25, 2026)

Grand Island Trail Runs takes place on Grand Island just offshore from Munising, Michigan (Williams Landing). Events listed are:

• 50K
• Marathon
• Half Marathon

The courses follow much of the island perimeter counterclockwise, passing Murray Bay and Duck Lake, then through the tombolo to Trout Bay. Runners traverse eastern cliffs with views toward Pictured Rocks National Lakeshore. The northern half of the island includes roughly 300 ft Jacobsville sandstone cliffs and North Beach. Trails mix singletrack, two-track, narrow dirt roads and occasional beach. Much of the route is shaded by hardwood forest; exposed cliff sections face Lake Superior.

Course details, logistics and policies

The 50K route goes inland around mile 22 to Echo Lake and the island summit, then returns to the western coastal trail. Aid stations are located at miles 4, 7, 11, 16, 22 and 27 for the 50K; the marathon shares these stations except mile 27; the half marathon has aid at miles 4 and 9. All runners must carry a 20 oz water bottle or other refillable hydration system. Aid station offerings include water, electrolyte drink and packaged gels.

Runners travel to the island by ferry; the ferry ride takes about ten minutes. Shuttle buses transport runners from hotels or designated pick-up points; parking at the ferry dock is limited. Drop-bag storage is provided near the start/finish. Entrant limit is 500. There are no refunds; transfers are allowed for a fee. Awards include age-group prizes and a finisher medallion. Dogs are allowed on the island and shuttle but are not allowed on the race course. Visit the organization's website for the most recent information.