Thumbs Up Summer Slam
July 18th 2026
Estes Park, CO
12 Hours
Repeating 2km out-and-back laps on the Thumb Open Space trail, 540ft of vertical gain each. Start at 7:10am, finish at 7:10pm. Sunup to sundown. Collect a poker chip at the turnaround on each lap. Most chips wins.
Distance awards at three milestones:
14 ascents — Estes Park 7,522'
19 ascents — Deer Mountain 10,103'
27 ascents — Longs Peak 14,259'
Limited to 35 participants.
Upcoming Races
Jul 18 2026
12 Hours
Multiple Loop
5
Elevation Rating
Mountainous, >12,500 feet in 50 miles
3
Surface Rating
Some rocks, root, and/or ruts
Results
No Past Races