Trail Run at Sly Park - Fall
Oct 24Pollock Pines, CA50K, Marathon +3
Also 50K, 24 mi from Thunder Mountain Trail Challenge
Thunder Mountain Trail Challenge
- 5.6 mi entry
- $85
- Aid stations
- 3
At a glance
- Last held
- Aug 8, 2026
- Next edition
- 2027 date not announced. Usually held in August.
- Location
- Kit Carson, California
- Distances
- 50K, 21 mi, 10.5 mi, 5.6 mi
- Aid stations
- 3, 2 with crew access
Listed from UltraSignup. Checked Aug 2, 2026.
Plan this race for free
3 aid stations are already loaded. Add cutoffs, pacing and the timeline your crew follows. Crew invites and race-day updates come with a Race Pass.
Build my planAbout this race
A scenic alpine trail running adventure in the High Sierra of Northern California, featuring three loops across the Sierra wilderness near the Lake Tahoe Basin with 7,500 feet of elevation gain at 7,400 feet above sea level. Distances range from 5.6 miles to a 50K with a 14-hour time limit.
Key dates
Standard ends
Aug 7, 2026
Registration closes
Aug 8, 2026
Race day
Aug 8, 2026
Pricing
50K
Race Day
$160
21 Miler
Race Day
$130
10.5 Miler
Race Day
$110
5.6 Miler
Race Day
$85
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Registration openings and major changes, like a new date or a cancellation.
Aid stations
3| Station | Distance | Crew | Drop bags | Cutoff | Supplies |
|---|---|---|---|---|---|
Start / Finish Line Aid Station Start/Finish aid station located near Horse Canyon Trail Junction off Highway 88. Crew accessible via road crossing near start/finish. Drop bags allowed here. Runners pass through at miles 10.5, 21, and 31.1. | 0.00 miles | 10:40 AM (Loop 1, Mile 10.5); 3:20 PM (Loop 2, Mile 21); 8:00 PM (Loop 3, Mile 31.1) | -- | ||
Thunder Mountain Trail Head Aid Station Located near the Thunder Mountain Trail Head. Crew accessible via road crossing near this station. Runners pass through this station three times (once per loop). | -- | -- | -- | ||
Horse Canyon Trailhead Water Stop Water-only stop available at the Horse Canyon Trailhead. Runners navigate a 7.4-mile section with no aid support on each loop. | -- | -- | water |
Entry transfers
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Race planning
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