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Summer half marathons near Denver (2027)
Updated
11 half marathons 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. 8 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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Run Juneteenth Day 5K/10K/13.1 Denver/Aurora
Sat Jun 19 · 7:00 AM · Centennial · Denver Suburbs
1 mile5K10KHalf marathon
from $30 -
Slacker Half Marathon-Relay-4-Mile Races
Sat Jun 26 · 7:30 AM · Georgetown · Foothills & Mountains
4 milesHalf marathon
from $35Reg. closed -
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 -
Heatwave Half Marathon/5K/10K - Denver
Sat Jul 17 · 7:00 AM · Denver · Denver
1 mile5K10KHalf marathon
from $22Goes up Jan 19 -
Bound for Boston Marathon & Half Marathon - Denver
Sun Aug 1 · 6:30 AM · Denver · Denver
Half marathonMarathon
from $45Reg. closed -
from $35Goes up Feb 8
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from $39Goes up May 17
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Pioneer Prairie Dog Half, 10k & 5k
Sun Aug 22 · 7:15 AM · Westminster · Denver Suburbs
5K10KHalf marathon
from $39Goes up May 24
Other seasons near Denver
Quick answers
How many half marathons are near Denver in summer 2027?
11 half marathons 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 Pioneer Prairie Dog Half, 10k & 5k on August 22.
What is the cheapest half marathon near Denver in summer 2027?
Heatwave Half Marathon/5K/10K - Denver on July 17 has the lowest listed entry fee: $22. Prices are before the registration platform's processing fee.
When does the next early-bird price end for half marathons near Denver?
All-Out Summer Breeze: the Half marathon goes from $65 to $70 after December 13. 7 more of these half marathons publish a later price increase.
Are there half marathons or marathons near Denver in summer 2027?
Yes: 11 half marathons and 1 marathon. The first is Colorado 13er (Half Marathon/10k/5k) on June 6.