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Summer trail races near Denver (2027)
Updated
5 trail races are on the calendar near Denver in summer 2027, starting with Colorado 13er (Half Marathon/10k/5k) on Sunday, June 6 in Louisville. That covers June to August. 5 of them publish an upcoming price increase, so signing up early saves money.
All summer races5K races (21)10K races (13)Half marathons (11)Trail races (5)
By date
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Colorado 13er (Half Marathon/10k/5k)
Sun Jun 6 · 6:30 AM · Louisville · Denver Suburbs
5K10KHalf marathonTrail
from $35Goes up Mar 1 -
from $35Goes up Dec 13
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from $35Goes up Jan 11
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Summer Splash Prairie Dog Half, 10k, & 5k
Sat Jul 17 · 6:30 AM · Castle Rock · Denver Suburbs
5K10KHalf marathonTrail
from $39Goes up Apr 18 -
from $35Goes up Feb 8
Other seasons near Denver
Quick answers
How many trail races are near Denver in summer 2027?
5 trail races are listed near Denver in summer 2027. The first is Colorado 13er (Half Marathon/10k/5k) on Sunday, June 6 in Louisville, and the last is All-Out Runapalooza on August 7.
What is the cheapest trail race near Denver in summer 2027?
Colorado 13er (Half Marathon/10k/5k) on June 6 has the lowest listed entry fee: $35. Prices are before the registration platform's processing fee.
When does the next early-bird price end for trail races near Denver?
All-Out Summer Breeze: the Half marathon goes from $65 to $70 after December 13. 4 more of these trail races publish a later price increase.
Are there half marathons or marathons near Denver in summer 2027?
Yes: 5 half marathons and 0 marathons. The first is Colorado 13er (Half Marathon/10k/5k) on June 6.