A fully supported 100-mile festival loop with sauna, cold plunge, and crew every 2 miles
Other trail races within 66 miles
Weld Your Mettle's 100-mile event challenges runners to repeatedly loop a flat, 4-mile groomed dirt out-and-back on a 146-acre private property outside Eaton, Colorado, until reaching 100 miles. What sets this race apart is its festival infrastructure: aid station and crew access every 2 miles, a fully stocked food barn, sauna, cold plunge, and massage zone are available throughout the entire 36-hour event window. Panoramic views of the Northern Colorado Front Range and Longs Peak surround the flat course. Supported by local nonprofits, this community-focused event emphasizes endurance, wellness, and connection.
Some ultra experience recommended
Eaton, CO, United StatesJune 05, 2027
Weld Your Mettle 100 Mile is a multi-loop trail race in Eaton, CO, United States, held on June 05, 2027. The course covers 100 miles and has a 36h cutoff.
This edition has its own course and we haven't mapped it yet. The interactive map, elevation profile and aid stations will appear here once the route is confirmed.
Aid stations for this edition aren't published yet. They'll appear here once the route is confirmed.
Free self-camping (tent and RV/camper) on the 146-acre property, first-come first-serve — no reservation needed. Camp setup begins Friday May 29 at noon. Paid Glamping Tents available via Sundrift Society as a race add-on (queen beds, bedding, weather-proof floor; tents reserved Friday–Monday).
Afternoon thunderstorms possible in late May on this flat, exposed Northern Colorado course
Late May temperatures can range from warm (70s°F) during the day to cold overnight; overnight sections require layering
No reviews for this event yet. Be the first to share your experience!
