Sun, Sep 27, 2026 · 6:30 AM · Boulder, CO
Girls on the Run Rockies Boulderthon SoleMates 2026
10KHalf MarathonMarathon
- Price
- $27.50
- Field size
- 15 · based on the organizer's entry cap
Marathons in Colorado
Every upcoming Marathon race we know about in Colorado. Where a detail isn't confirmed, we mark it unknown rather than guessing.
Race results
Showing 11+ of 11 races · loading the full list…
Sat, Oct 3, 2026 · 7:00 AM · Colorado Springs, CO
Colorado Springs Marathon, Half, 5K, and Kids K
1K5KHalf MarathonMarathon
- Price
- Free-$140.38
- Field size
- 20 · based on the organizer's entry cap
Sun, Oct 4, 2026 · 7:00 AM · Windsor, CO
Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run
1M5K10KHalf MarathonMarathon
- Price
- $20-$140
Sat, Oct 10, 2026 · 8:00 AM · Breckenridge, CO
Breckenridge RunFest
1M5K10KHalf MarathonMarathon
- Price
- Free-$141.55
Sat, Oct 10, 2026 · 7:30 AM · Fort Collins, CO
The Long View Marathon
5KHalf MarathonMarathon
- Price
- $48.70-$128.20
- Field size
- 1,000 · based on the organizer's entry cap
Sat, Oct 17, 2026 · 7:00 AM · Fort Collins, CO
Blue Sky Trail Marathon & Half Marathon
13.8MMarathon3,500 ft gain
- Price
- $117.60-$138.80
- Field size
- 300 · based on the organizer's entry cap
Sun, May 2, 2027 · 6:30 AM · Fort Collins, CO
The Colorado Marathon
5K10KHalf MarathonMarathon
- Price
- $48.70-$170.60
Sat, Jun 5, 2027 · 6:00 AM · Eaton, CO
Weld Your Mettle Running Festival
4.3M14MMarathonUltra
- Price
- $38.10-$223.60
0.5M10KHalf MarathonMarathon
- Price
- Free-$140.60
- Field size
- 2,250 · based on the organizer's entry cap
Fri, Jun 25, 2027 · 1:30 PM · Alma, CO
Race in the Clouds - Alma Dirt Festival 2027
10KHalf Marathon22MMarathonUltra2,600 ft gain
- Price
- $43.40-$69.90
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