Huron 100
Whitmore Lake, United States • 6 Jun 2026
Huron 100 - June 6, 2026
The Huron 100 is a point to point ultramarathon event in Grass Lake, Michigan, held across the Huron River Watershed. The event includes multiple race options and passes through six State Recreation areas, two metroparks, and one county park. The courses are predominantly trail running with substantial elevation gain.
Distances and options:
- 100 Mile: point to point; 80% trail; ~8000 ft elevation; 15 aid stations.
- 50 Mile: point to point; 83% trail; ~4300 ft elevation; 8 aid stations.
- PACER option available.
Course surfaces are listed by percentage and include trail, bike path, dirt road, gravel, and paved sections. Aid station support includes several crew-access stations for each race and published time cutoffs of 32 hours for the 100 mile and 15 hours for the 50 mile. Start location is Portage Lake at Waterloo State Recreation Area; finish locations include Proud Lake Recreation Area and Country Lake Elementary School, with shuttle service offered from those finish points. Packet pickup is scheduled for the day before the race, location and time to be announced.
Registration pricing varies by date, with the 100 mile entry ranging from $275 to $375 and the 50 mile entry ranging from $175 to $225. Refund and transfer policies depend on request date; transfers are limited to the 2027 race and runner to runner transfers are not permitted. The event is organized as a 501(c)(3) charity with proceeds used to protect the Huron River Watershed and with cupless and zero waste goals. Volunteers receive a shirt and registration discounts; additional details and rules are provided by the organizer. Visit the organization's website for the most recent information.