Grand Island Trail Marathon
Race Day Weather
Comfortable temps, big temp swing
Mild 58°F temps at gun time mean comfortable early miles without overheating risk. Temps will climb significantly to 77°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing. Moderate humidity at 72% is worth noting for effort level, especially in later miles.
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Race Info
The Grand Island Trail Marathon takes place on Grand Island, a roughly 13,500-acre island in Lake Superior reachable only by ferry from Munising, Michigan. The race offers 50K, marathon, and half marathon distances along the island's perimeter trail, passing 300-foot Jacobsville sandstone cliffs and shoreline views of Pictured Rocks National Lakeshore. The marathon course measures about 27 miles, longer than the standard 26.2-mile distance. Entries are capped at 500 runners combined across all three distances.
