Singletrack Jim Walmsley on the UTMB Playbook, the "Black Shorts" Idea, and the Future of Trail Running
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Nov 7, 2025 In this conversation, Jim Walmsley, a renowned professional ultra-trail runner, shares his insights on the transition from marathon to trail racing and the nuances of pacing in ultra events. He introduces the innovative 'Black Shorts Series,' aimed at elevating trail running's profile with team sponsorship and marquee races. Jim reflects on the evolution of the sport, the importance of managing low points during races, and his training strategies in a competitive environment. He also discusses athlete representation and the depth of the current racing field.
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Black Shorts Series To Attract Sponsors
- Jim proposes a branded league where teams wear black shorts to attract big corporate sponsors and guarantee athlete income. He argues this would professionalize trail racing and ensure consistent head-to-head competition.
Designing A Truly Global Race Series
- A global series needs big stages like UTMB or Western States plus geographic balance to include Asia and other markets. Course aesthetics and brand reach matter as much as difficulty when designing a pro circuit.
Use Athlete Representation To Influence Races
- Support athlete representation groups like the PTRA to improve runner conditions and negotiate with race organizers. Use those groups to funnel athlete feedback to race leadership.