TUM DirectoryBy The Ultra Minute

Athlete

Tim Tollefson

Runner

Tim Tollefson is a trail runner and founder of Mammoth Trail Fest. In a June 2026 interview, he described moving from road marathoning into trail running and building an event around community and connection.

Sport and event work
Trail runner · Mammoth Trail Fest founderOriginal public-source context; separate from dated TUM coverage.Source

14 TUM reports · Published coverage below

Publication history

Coverage over time

14 editorial issues

Distinct issues per publication month. Each issue counts once.

Tim Tollefson — monthly TUM coverageFrom Jul 2024 through Nov 2026. Highest month: 3 issues. Exact counts are provided in the accessible chart description.Jul 2024: 1 editorial issueAug 2024: 0 editorial issuesSep 2024: 2 editorial issuesOct 2024: 1 editorial issueNov 2024: 0 editorial issuesDec 2024: 0 editorial issuesJan 2025: 1 editorial issueFeb 2025: 2 editorial issuesMar 2025: 0 editorial issuesApr 2025: 1 editorial issueMay 2025: 0 editorial issuesJun 2025: 0 editorial issuesJul 2025: 1 editorial issueAug 2025: 0 editorial issuesSep 2025: 0 editorial issuesOct 2025: 0 editorial issuesNov 2025: 0 editorial issuesDec 2025: 0 editorial issuesJan 2026: 0 editorial issuesFeb 2026: 0 editorial issuesMar 2026: 0 editorial issuesApr 2026: 0 editorial issuesMay 2026: 1 editorial issueJun 2026: 1 editorial issueJul 2026: 0 editorial issuesAug 2026: 3 editorial issuesSep 2026: 0 editorial issuesOct 2026: 0 editorial issuesNov 2026: 0 editorial issues
Jul 2024Peak 3Nov 2026

Monthly editorial issue counts: Jul 2024: 1; Aug 2024: 0; Sep 2024: 2; Oct 2024: 1; Nov 2024: 0; Dec 2024: 0; Jan 2025: 1; Feb 2025: 2; Mar 2025: 0; Apr 2025: 1; May 2025: 0; Jun 2025: 0; Jul 2025: 1; Aug 2025: 0; Sep 2025: 0; Oct 2025: 0; Nov 2025: 0; Dec 2025: 0; Jan 2026: 0; Feb 2026: 0; Mar 2026: 0; Apr 2026: 0; May 2026: 1; Jun 2026: 1; Jul 2026: 0; Aug 2026: 3; Sep 2026: 0; Oct 2026: 0; Nov 2026: 0.

Sponsor mentions, repeated links and polls are excluded. Credits within editorial items may count. Read the supporting timeline ↓

In The Ultra Minute

Newest first

Published in TUM

Leadville’s 2026 podiums

TUM reported Macdonald and Hickory’s wins, separate men’s and women’s podiums and several runners’ progress through the race.

Published in TUM

Leadville’s alternate course preview

TUM described the fire-related alternate course, Sugden’s analysis and pre-race interviews. A preview does not establish who started or finished.

Published in TUM

Ultra Uncovered’s Leadville conversations

TUM linked the Tollefson and Cade episodes and Shalvoy’s Women Can launch, keeping those different roles explicit.

Published in TUM

Rest Day Live interview and discussion topics

Tim Tollefson: Rest Day Live appearance or discussion participant.

Published in TUM

Two different Cocodona podcast discussions

TUM identified Tollefson as a Rest Day Live co-host for Entrekin’s appearance.

Published in TUM

The July 2025 PTRA antidoping talk

TUM announced a PTRA talk led by Tim Tollefson, Ida Nilsson and Francesco Puppi for July 23,2025. It is a dated event announcement, not an allegation about any participant.

Event date: 2025 · TUM publication: July 19, 2025

Published in TUM

PTRA elects three new board members

Named as newly elected to the PTRA Board in the April 2025 report.

Published in TUM

15 Hours features Tollefson

Subject of the new 15 Hours film about leaving physical therapy and focusing on Mammoth Trailfest.

Published in TUM

Lytle and Garmire’s Black Canyon video

Appeared styling Garmire’s hair in the video.

Event date: 2025 · TUM publication: February 14, 2025

Published in TUM

The announced 2025 Mammoth 200

TUM linked Sally McRae’s route film and Tim Tollefson’s Trail Network discussion of the Mammoth 200 planned forSeptember 2025. Race vision, registration and exploration footage are not proof a later race occurred; the200-mile event is distinct from Mammoth Trail Fest.

Event date: 2025 · TUM publication: January 2, 2025

Earlier coverage (4)
Published in TUM

Tollefson’s Craft film reflection

Appeared in a Craft film reflecting on his UTMB experience and motivation.

Published in TUM

Tollefson’s Mammoth personal project

Credited with conceiving the 200-mile personal project; no race-director, support or participant result inferred.

Published in TUM

Farvard’s dated Hoka and Neversecond signings

TUM says he saw an opportunity to make a joke about the Farvard/second-place context; the gallery’s joke text is not read or reproduced.

Published in TUM

The named TrailCon events-panel participants

Named in the embedded TrailCon events-panel title; no additional job title, race result or watched/listened-to claim.

Repeated links & other mentions (1)
Repeated link

Freetrail’s Auburn preview

Dylan Bowman hosted Freetrail’s Canyons 100K preview with Tim Tollefson and Corrine Malcolm, covering both fields and race-week conditions.

Connections

Named in 2026 result coverage

Leadville Trail 100

TUM reported Macdonald and Hickory’s wins, separate men’s and women’s podiums and several runners’ progress through the race.

Source

Rest Day Live appearance or discussion participant

Freetrail

Rest Day Live featured Tyler Andrews following his Everest ascent and discussion with Tim Tollefson. Jornet, Mogavero and Thévenard were named discussion topics, which does not establish their appearance as guests.

Source

Elected to the Board in the 2025 report

PTRA

Rosanna Buchauer, Tim Tollefson and Ida Nilsson were elected to the PTRA Board. Corrine Malcolm, Kaytlyn Gerbin, Adam Merry and Nancy Jiang were outgoing; Malcolm and Gerbin were to remain involved as advisers.

Source

Subject of the newly linked film

15 Hours

TUM recommended Billy Yang’s new 15 Hours film about Tim Tollefson leaving physical therapy and shifting from personal race goals to building Mammoth Trailfest. Past series subjects included Anton Krupicka, Ann Trason and Hayden Hawks.

Source
Sources & notes

Facts above link directly to their sources. Published TUM dates and public-source check dates describe different things.

Public background sources checked October 22, 2026. The selection contains 127 published issues.

Interface icons: Lucide · ISC license.

Public background & sources Checked October 22, 2026

Career context from one original public source. TUM’s dated reporting appears below.

    This is a limited career snapshot, checked October 22, 2026. Source publication dates and event dates are shown separately.

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