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This week

9
SAT
9
MAY
Run·Road·5K

Run For The Trees - 2 Mile Fun Run

Loveland, US
SAT
9
MAY
Run·Road·5K

Run for the Trees - BSBF 2-Mile Run

Loveland, US
SAT
9
MAY
Run·Road·5K·Half

Carbon Valley Half Marathon & 5K

Firestone, US
SAT
9
MAY
Run·Road·5K

10th Annual Fort Collin's Mother's Day 5K

Fort Collins, US
SAT
9
MAY
Run·Road·Full·Ultra

Quad Rock 25 & 50 Mile Trail Races

Bellvue, US
SAT
9
MAY
Run·Trail·Half

The Great CO74 Trail Run

Kittredge, US
SUN
10
MAY
Run·Trail·Half

Trail des Petits Souliers - 14 km 2026

St Joseph, FR
TUE
12
MAY
Run·Road·5K

2026 Dash & Dine 5k Run Series

Boulder, US
FRI
15
MAY
Run·Trail·5K

Know. Grow. GO RUN. 5K

Loveland, US

Next week

3
SUN
17
MAY
Run·Road·5K

Healing Warriors Program 2026 Annual 5K Fun Run

Fort Collins, US
TUE
19
MAY
Run·Road·5K

2026 Dash & Dine 5k Run Series

Boulder, US
SAT
23
MAY
Run·Road·5K

Mile High Mile

Boulder, US

This month

8
MON
25
MAY
Run·Road·10K

BOLDERBoulder by Runners Roost

Boulder, US
FRI
29
MAY
Run·Road·10K

Bolder BOULDER 10K

Boulder, US
SAT
30
MAY
Run·Road·5K

36th Annual Fire Hydrant 5K & Expo

Fort Collins, US
SAT
30
MAY
Run·Road·5K

Dash4Hope 2026

Greeley, US
SAT
6
JUN
Run·Road·5K

Berthoud Day 5K

Berthoud, US
SAT
6
JUN
Run·Road·5K

J-Town Jog 5K and Kids 1 Mile Dash

Johnstown, US
SUN
7
JUN
Run·Trail·10K

Crazy Legs 10k+ Trail Run

Loveland, US
SUN
7
JUN
Run·Road·5K·10K·Half

Colorado 13er (Half Marathon/10k/5k)

Louisville, US