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Running Calendar near Chatfield Reservoir 2026-2027

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Explore the top running races near Chatfield Reservoir for 2026-2027! We've gathered 164 exciting races in the area. Check out our detailed list below to find your next local race.

Half Marathons Marathons Trail Runs Triathlons
August 2026
Aug
15
Sa

Roxborough Ultras

Trail Run 31 mi 50 mi
Aug
15
Sa

The Best Races - Foxfield

Road Race 5 km 10 km 13 mi
The Best Races - Foxfield
Aug
15
Sa

Miles for Migraine Colorado

Road Race 5 km
Aug
15
Sa

Westminster Night Trail

Trail Run 5 km 10 km ... 35 km 50 km
Aug
15
Sa

ThunderRidge Grizzly 2 Mile

2 mi
Monthly updates for Chatfield Reservoir

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Aug
16
Su

Cancer League of Colorado Race 4 Research

Road Race 5 km
Aug
19
We

Embrace the Pace x We're Not Really Runners - Lot 46 Music Bar

Aug
22
Sa

Ram Run

5 km
Aug
22
Sa

Staunton Rocks

Trail Run 13 mi 26 mi
Aug
22
Sa

Jog in the Bog 5K

5 km
Aug
22
Sa

Evergreen Trail Race Series

Trail Run 5 km 11 mi
Aug
23
Su

Pioneer Prairie Dog Half

5 km 10 km 13 mi
Aug
23
Su

Rebel Run 5k

5 km
Aug
23
Su

Wellington Swim-Run Challenge

Aquathlon Wellington Swim-Run Chall... 0.3 mi 1.6 km 0.3 mi 1.6 km 0.3 mi 1.6 km
Aug
29
Sa

Rock Hawk

Trail Run 5 km 10 km 25 km 50 km
Aug
29
Sa

RexRun For PAWSitivity Trail Run/Walk

Trail Run 5 km
Aug
29
Sa

The Best Races - Foxfield

Road Race 5 km 10 km 13 mi
The Best Races - Foxfield
Aug
29
Sa

Glow & Roll - Littleton

Road Race 2 mi 5 km
Aug
29
Sa

Historic Elizabeth Main Street 5K

Road Race 5 km
Aug
30
Su

Bluffs Run 8K

8 km
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