Wild Duluth Races
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Event overview
Wild Duluth Races take place in Duluth, Minnesota on October 18-19, 2025. The event includes ultramarathons and shorter trail races that use sections of the Superior Hiking Trail. Course terrain is described as rugged, rocky and rooty, and parts of the routes pass near Lake Superior and Ely's Peak. The 100K and 50K events were established in 2009, the half marathon in 2010, and the Terribly Tough 10K was added in 2019.
Races and logistics
Races and primary locations:
- 100K - start at Bayfront Park; finish at Bayfront Park
- 50K - start at Oldenburg Point Picnic Area, Jay Cooke State Park
- 13.1M (Harder 'n Heck Half Marathon) - start at Chambers Grove Park; finish at Spirit Mountain
- 10K (Terribly Tough) - start at Munger Trail Trailhead; finish at Spirit Mountain
Entry fees differ by race and by registration date: for example, the 100K is listed at $120 by September 17 and $130 after, the 50K at $95/$105, the half at $85/$95 (350 runner limit), and the 10K at $45/$55. A combined-challenge option recognizes participants who complete multiple races across the weekend (WILDMAN/WILDWOMAN and ULTIMATE versions). Runners who volunteer the day before or after are eligible for entry discounts if they volunteer an entire day at the companion events. Long-sleeve shirts for the 100K, 50K and half are unisex; 10K shirts are offered in men’s and women’s cuts. Visit the organization's website for the most recent information.