Fri, Sep 25, 2026 · 6:00 AM · Red Feather Lakes, CO
Red Feather Trail Jamboree
Half MarathonUltra4,200 ft gain
- Price
- $117.60-$358
- Field size
- 200 · based on the organizer's entry cap
Half Marathons in Colorado
Every upcoming Half Marathon race we know about in Colorado. Where a detail isn't confirmed, we mark it unknown rather than guessing.
Race results
Showing 60+ of 91 races · loading the full list…
Sat, Sep 26, 2026 · 7:30 AM · Centennial, CO
Oktoberfest Run 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$54
Sat, Sep 26, 2026 · 7:30 AM · Centennial, CO
Run for Donuts 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$54
Sun, Sep 27, 2026 · 7:00 AM · Boulder, CO
Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado
5K10KHalf Marathon
- Price
- $526
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
Sat, Oct 3, 2026 · 8:30 AM · Canon City, CO
Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon
5K10K8MHalf Marathon
- Price
- Free-$96.40
- Field size
- 623 · based on the organizer's entry cap
Sat, Oct 3, 2026 · 8:00 AM · Littleton, CO
Spooky Sprint - Denver
1M5K10KHalf Marathon
- Price
- Free-$87.72
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 · Centennial, CO
Cookie Run 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Oct 10, 2026 · 7:30 AM · Centennial, CO
Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
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 24, 2026 · 8:00 AM · Mancos, CO
Mancos Cowboy Half Marathon, 5K, and Fun Run
1M5KHalf Marathon
- Price
- Free-$80.50
- Field size
- 74 · based on the organizer's entry cap
Sat, Oct 31, 2026 · 9:00 AM · Lone Tree, CO
HRCA Backcountry Wilderness Half Marathon
Half Marathon
- Price
- $70
Sat, Oct 31, 2026 · 8:00 AM · Colorado Springs, CO
Spooky Sprint - Colorado Springs
1M5K10KHalf Marathon
- Price
- $20.83-$67.58
Sat, Oct 31, 2026 · 7:30 AM · Centennial, CO
PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$54
Sat, Oct 31, 2026 · 7:30 AM · Centennial, CO
Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$54
Sat, Nov 7, 2026 · 8:00 AM · Littleton, CO
Turkey Trails- Denver
1M5K10KHalf Marathon
- Price
- $20.83-$81.36
Sun, Nov 8, 2026 · 8:00 AM · Colorado Springs, CO
Turkey Trails - Colorado Springs
1M5K10KHalf Marathon
- Price
- $20.83-$67.58
Sat, Nov 14, 2026 · 7:30 AM · Centennial, CO
Run for Mental Health 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Nov 14, 2026 · 7:30 AM · Centennial, CO
Veterans Day Freedom Run 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Nov 14, 2026 · 8:00 AM · Aurora, CO
Salute to Veterans 5K/10K/Half Marathon - Denver
5K10KHalf Marathon
- Price
- Free-$75.80
Sat, Nov 14, 2026 · 7:30 AM · Loveland, CO
Lone Tree Reckoning Half and 5K
5KHalf Marathon
- Price
- $48.70-$80.50
Sun, Nov 15, 2026 · 8:00 AM · Colorado Springs, CO
Salute to Veterans 5K/10K/Half Marathon - Colorado Springs
5K10KHalf Marathon
- Price
- Free-$75.80
Sat, Nov 21, 2026 · 8:40 AM · Arvada, CO
TURKEY TREK (13.1, 10k, 5k & 2k)
2K5K10KHalf Marathon
- Price
- $29-$74
Sat, Nov 28, 2026 · 7:30 AM · Centennial, CO
Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Nov 28, 2026 · 7:30 AM · Centennial, CO
Thanksgiving Gobble Trot Run 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sun, Dec 6, 2026 · 8:30 AM · Pueblo, CO
Rock Canyon Half Marathon- 40th Anniversary Run!
5KHalf Marathon
- Price
- $38.10-$64.60
- Field size
- 800 · based on the organizer's entry cap
Sat, Dec 12, 2026 · 7:30 AM · Centennial, CO
Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Dec 12, 2026 · 7:30 AM · Centennial, CO
Sunrise Marathon 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Dec 26, 2026 · 7:30 AM · Centennial, CO
A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Dec 26, 2026 · 7:30 AM · Centennial, CO
New Year's Run 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Jan 16, 2027 · 7:30 AM · Centennial, CO
MLK Jr. Freedom Run 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Jan 16, 2027 · 7:30 AM · Centennial, CO
Sunrise Marathon 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Jan 23, 2027 · 8:30 AM · Colorado Springs, CO
Chilly Willy 5K/10K/Half Marathon - Colorado Springs
5K10K13.1KHalf Marathon
- Price
- $33.60-$65.20
Sat, Jan 30, 2027 · 9:00 AM · Denver, CO
Time Travel Half-Marathon/5K/10K - Denver
1M5K10KHalf Marathon
- Price
- $18.83-$54.28
Sat, Jan 30, 2027 · 7:30 AM · Centennial, CO
Coffee Lover Run DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Jan 30, 2027 · 7:30 AM · Centennial, CO
Run for Donut DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sun, Jan 31, 2027 · 8:00 AM · Colorado Springs, CO
Time Travel Half-Marathon/5K/10K - Colorado Springs
1M5K10KHalf Marathon
- Price
- $18.83-$52.28
Sat, Feb 13, 2027 · 7:30 AM · Centennial, CO
Valentine's Day Run 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Feb 13, 2027 · 7:30 AM · Centennial, CO
Run for Chocolate 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sun, Feb 14, 2027 · 9:00 AM · Arvada, CO
Ralston Creek Half Marathon & 5k
5KHalf Marathon
- Price
- $27.50-$133.50
Sun, Feb 14, 2027 · 10:00 AM · Colorado Springs, CO
The Toyota Super Half Marathon™& Game Day 5K™
5KHalf Marathonflat and fast
- Price
- $38.10-$75.20
Sat, Feb 27, 2027 · 7:30 AM · Centennial, CO
Run Together Against Breast Cancer DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Feb 27, 2027 · 7:30 AM · Centennial, CO
Run For Mental Health DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Mar 6, 2027 · 8:00 AM · Denver, CO
Time to Paddy 5K/10K & Lucky 13.1 13.1 - Denver
1M5K10KHalf Marathon
- Price
- Free-$62.28
- Field size
- 31 · based on the organizer's entry cap
Sun, Mar 7, 2027 · 8:00 AM · Colorado Springs, CO
Time to Paddy 5K/10K & Lucky 13.1 - Colorado Springs
1M5K10KHalf Marathon
- Price
- Free-$46.28
- Field size
- 31 · based on the organizer's entry cap
Sun, Mar 14, 2027 · 9:15 AM · Severance, CO
Lucky Brew Race 5K, 10K, 15k & Half Marathon
0.6M5K10K15KHalf Marathon
- Price
- $22.20-$85.80
Sat, Mar 20, 2027 · 7:30 AM · Centennial, CO
Sunrise Marathon 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Mar 20, 2027 · 7:30 AM · Centennial, CO
St. Paddy's Day Lucky Run 5K/10K/13.1 DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Sat, Mar 27, 2027 · 7:30 AM · Centennial, CO
Always Hope Easter Run DENVER/AURORA
1M5K10KHalf Marathon
- Price
- $32.80-$48.70
Browse related categories
All Half MarathonsAll races in ColoradoHalf Marathons in TexasHalf Marathons in FloridaHalf Marathons in CaliforniaHalf Marathons in GeorgiaHalf Marathons in MissouriHalf Marathons in New JerseyHalf Marathons in WashingtonHalf Marathons in North CarolinaHalf Marathons in New YorkHalf Marathons in Kentucky5Ks in Colorado10Ks in ColoradoUltras in ColoradoMarathons in Colorado