6 hrCompleted
Thumbs Up Summer Slam
- Entry
- $100
At a glance
- Last held
- Jul 18, 2026
- Next edition
- 2027 date not announced. Usually held in July.
- Location
- Estes Park, Colorado
- Distances
- 6 hr
Listed from UltraSignup. Checked Jul 12, 2026.
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Build my planAbout this race
Repeating 2km out-and-back laps on the Thumb Open Space trail with 540ft of vertical gain each lap. Start at 7:10am, finish at 7:10pm from sunup to sundown.
Key dates
Registration closes
Jul 15, 2026
Race day
Jul 18, 2026
Pricing
Current price
$100
Registration
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Race planning
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