Grand Island Trail Marathon

Grand Island Trail Runs : Munising, Michigan

The Grand Island Trail Runs take place on Grand Island, a largely undeveloped island offshore from Munising, Michigan. The event offers three trail distances that follow the island perimeter and interior trails through hardwood forest, along sandy beaches, and beside high Jacobsville sandstone cliffs.

The courses combine singletrack, two track, narrow dirt roads and stretches of sandy beach. Notable route features include Trout Bay, Echo Lake, the island tombolo, North Beach, Murray Bay, Duck Lake and Merchandise Beach. Courses are marked with colored flags, directional arrows and mile markers.

Aid stations are placed on course; all runners are required to carry a 20 oz water bottle or other functional hydration system for refilling. The 50K uses five aid stations with some repeated stops, the marathon shares most 50K stations, and the half marathon has two aid stations. Time limits and cutoff points apply to each distance.

Logistics include shuttle transport to the ferry dock from designated pickup locations and limited parking at the ferry dock for island residents, employees and volunteers. Drop bags can be stored in a tent near the start and finish; items left on the island are returned to the mainland ferry boat store. Dogs are allowed on the shuttle, ferry and start area but are not permitted on the race course. Visit the organization's website for the most recent information.