Half-Marathon races in Colorado, United States — 2026 running calendar

Mancos Cowboy Half Marathon, 5K, and Fun Run

Mancos, Colorado, United States

Oct 24, 2026 (Sat)

Free - $75.00

Running

Half-Marathon 5K 1.6K

PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Oct 31, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Oct 31, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

All-Out Kooky-Spooky

Golden, Colorado, United States

Nov 1, 2026 (Sun)

$25.00 - $70.00

Running

Half-Marathon 10K 5K +2

Turkey Trails- Denver

Littleton, Colorado, United States

Nov 7, 2026 (Sat)

$22.00 - $67.00

Running

1.6K 5K 10K Half-Marathon

Turkey Trails - Colorado Springs

Colorado Springs, Colorado, United States

Nov 8, 2026 (Sun)

$22.00 - $54.00

Running

1.6K 5K 10K Half-Marathon

Veterans Day Freedom Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Nov 14, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

TURKEY TREK (13.1, 10k, 5k & 2k)

Arvada, Colorado, United States

Nov 21, 2026 (Sat)

$29.00 - $69.00

Running

Half-Marathon 10K 5K 2K

Thanksgiving Gobble Trot Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Nov 28, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

All-Out Fa La La

Westminster, Colorado, United States

Dec 5, 2026 (Sat)

$25.00 - $70.00

Running

Half-Marathon 10K 5K +2

Rock Canyon Half Marathon- 40th Anniversary Run!

Pueblo, Colorado, United States

Dec 6, 2026 (Sun)

$35.00 - $55.00

Running

Half-Marathon 5K

Sunrise Marathon 5K/10K/13.1 Denver/Aurora

Centennial, Colorado, United States

Dec 12, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2