$100
Registration
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.
Registration Closes
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Race Day
Jul 18, 2026
Registration opens, price changes, race updates: straight to your inbox.
Current Price
$100
Registration
Build your aid station plan, organize your crew, and dial in your nutrition strategy. Everything you need to finish strong.
Make Race PlanAre you the race director for Thumbs Up Summer Slam?
Claim this race to manage registration, volunteers, and race-day ops on Endurance HQ.
