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Huron 100

Grass Lake, United States • 7 Jun 2025

The Huron 100 is an endurance running event held in Grass Lake, Michigan, featuring a 100-mile race and a 50-mile option called the Waterloo-Pinckney 50. Both are point-to-point courses traversing the Huron River Watershed, covering multiple state recreation areas, metroparks, and a county park. The 100-mile race consists of 80% trail with about 8,000 feet of elevation gain, supported by 14 aid stations, while the 50-mile race is 83% trail with 4,300 feet of elevation and 8 aid stations. The event emphasizes environmental stewardship, aiming to be cupless and zero waste, with proceeds benefiting watershed protection. Awards include belt buckles and medals for finishers. Visit the organization's website for the most recent information.

United States Michigan Grass Lake

Race information

Website Registration
100 mi
8000 m+
100 Miler
50 mi
4300 m+
50 Miler
Visit the organization's website for the most recent information.
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