Singletrack Jim Walmsley on the UTMB Playbook, the "Black Shorts" Idea, and the Future of Trail Running
14 snips
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.
AI Snips
Chapters
Transcript
Episode notes
Javelina's Fast Day And Ice Strategy
- Jim watched Javelina from Europe and noticed unusually fast times and abundant ice support. He connects aggressive racing and aid strategies to the speedy results.
Why Marathon Speed Doesn’t Guarantee Ultra Success
- Marathoners bring big engines but can struggle with ultra-specific demands like long climbs, walking and late-race recovery. Trail racing rewards pacing, experience with walking, and regaining rhythm after being broken.
JFK Crash, Shoe Swap And Coca‑Cola Fix
- Jim recounted bonking and calf cramps at JFK, switching shoes mid-race and drinking Coca-Cola to recover. He finished strong despite a multi-minute stop and still set a notable time.