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Trail Running Calendar near Nederland 2026-2027

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Explore the top trail runs near Nederland for 2026-2027! We've gathered 25 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.

October 2026
Oct
25
Su

Monsterdash - Louisville

Trail Run 5 km 10 km Half Marathon
MonsterDASH Louisville on Oct 25, 2026 offers a new half marathon plus 5k, 10k and a kids mile with costume contests, expo, and themed runner perks.
Oct
31
Sa

Eerie Erie

Road Race Trail Run Walk 5 km 10 km
A Halloween themed 5k and 10k through historic downtown Erie and Coal Creek trails, with a kids Goblin Run and BOLDERBoulder qualifier status. The event supports the Erie Optimist Club as its primary fundraiser.
November 2026
Nov
14
Sa

Louisville Trail Race

Trail Run 5 km 10 km 13 mi
Trail races in Louisville Colorado offering a half marathon, 10K and 5K on dirt trails with views of the Flat Irons and on course aid stations.
December 2026
Dec
5
Sa

Thumbs Up Vertical Challenge

Trail Run
Limited to 40 runners on the Thumb Open Space trail in Estes Park, participants repeat 2 km laps with 540 ft gain and collect poker chips to record ascents.
June 2027
Jun
12
Sa

Summits Trail Runs

Trail Run Backyard Ultra 6 mi Half Marathon Marathon 50 km
Trail races at Granby Ranch Resort in Colorado on June 12, 2027, across multiple distances including a 14-hour Elevation Challenge scored by total elevation climbed. The event uses mountain single-track, aid stations, drop bags, and has a 250 runner..
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