Tim Tollefson Talks Ultra Durability, Race Directing, and the Power of Community

In episode #178 we spoke with Tim Tollefson, pro ultra runner and RD and founder of mammoth trailfest and TheMammoth 200 about:

  • His path as a pro runner
  • The evolving landscape of trail events
  • The significance of volunteerism, community engagement, and sustainable growth in trail running
  • Practical advice on altitude adaptation, nutrition strategies
  • How we can help grassroots races thrive sustainably.

An appreciator of the imperfect, our next guest Tim Tollefson believes that access to the outdoors is essential for community health and that our next step, no matter the size, should be taken together. He is founder and head crafter of the mammoth trailfest, one of the country’s largest trail running events – and largest 50k – that was created to offer opportunity, access, and education through running. He is also the race director of The Mammoth 200, which will launch its second class of finishers in 2026 after a successful inaugural year in 2025. Tim is also a professional runner for Craft Sportswear, 3x USATF Trail National Champion, 2x Olympic Trails Marathon Qualifier, advocate for mental illness awareness, and an orthopedic physical therapist. His advocacy extends also into being a member of the boards of both Runners for Public Lands and the Professional Trail Runners Association. Tim and his wife Lindsay live in Mammoth Lakes, and are parents to Nacho, a rollicking 12lb doodle.

Please note that this podcast is created strictly for educational purposes and should never be used for medical diagnosis or treatment.

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