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Summer races near Denver (2027)
Updated
26 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. 19 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 $30Goes up Feb 1
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from $35Goes up Dec 13
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Reg. closed
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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 -
from $32Goes up Mar 16
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from $18Goes up Nov 1
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from $12Goes up Mar 22
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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 Mar 1
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from $35Goes up Jan 11
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from $30Goes up Feb 28
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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 -
from $35Goes up Jul 5
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from $20Goes up May 2
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Bound for Boston Marathon & Half Marathon - Denver
Sun Aug 1 · 6:30 AM · Denver · Denver
Half marathonMarathon
from $45Reg. closed -
from $30
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from $35Goes up Feb 8
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from $22Goes up May 4
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from $20Reg. closed
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from $44Goes up May 9
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from $39Goes up May 17
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Reg. closed
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from $10Goes up Dec 31
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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 races are near Denver in summer 2027?
26 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 Pioneer Prairie Dog Half, 10k & 5k on August 22.
What is the cheapest race near Denver in summer 2027?
Ram Run 5K on August 21 has the lowest listed entry fee: $10. Prices are before the registration platform's processing fee.
When does the next early-bird price end for races near Denver?
Unicorn 5k (North): the 5K goes from $41 to $46 after November 1. 18 more of these races 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.