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Running Calendar near Fort Collins 2025-2026

Explore the top running races near Fort Collins for 2025-2026! We've gathered 44 exciting races in the area. Check out our detailed list below to find your next local race.

August 2025
Aug
1-2
Fr - Sa

Rocky Mountain Half Marathon

5 km 13 mi
Aug
1-2
Fr - Sa

Wild West Relay

Trail Run 200 mi
Aug
2
Saturday

Valley 5K

5 km
Aug
5-26
Tu - Tu

Lory Summer Trail Series

Trail Run 5 km 10 km 12 km
Aug
5
Tuesday

Eltuck Valley 5K

Trail Run 5 km
Aug
8-9
Fr - Sa

Choice City Running Festival

5 km 10 km 13 mi
Aug
9
Saturday

Dog Days of Summer

3 mi
Aug
9
Saturday

Severance Glow 5K

5 km
Aug
9
Saturday

Sunrise Stampede

5 km
Aug
12
Tuesday

Into The Hills Eltuck 10K

Trail Run 10 km
Aug
15
Friday

Weld County Commissioner's Cup 5k

3 km 5 km
Aug
16
Saturday

Longmont Try-A-Tri

Triathlon
Aug
19
Tuesday

Into The Hills Eltuck 5K

Trail Run 5 km
Aug
26
Tuesday

Eltuck Valley 12K Trail Series

Trail Run 12 km
Aug - Sep
28-1
Th - Mo

Front Range Ultra Dayze

Trail Run 50 km 12 hr ... 72 hr 100 hr
Aug
30
Saturday

Recovery Run of the Rockies 5K

5 km
September 2025
Sep
1
Monday

FCA All Abilities 5K

5 km
Sep
5-6
Fr - Sa

American Heroes Run

Trail Run 5 km 9 mi ... 100 mi 24 hr
Sep
6
Saturday

Black Squirrel Half

Trail Run 13 mi
Sep
14
Sunday

Fall Equinox Marathon

5 mi 13 mi 26 mi
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