Race Calendar in Colorado, United States

Manitou 5K

Manitou Springs, Colorado, United States

10 Oct, 2026 (Sat)

$25.00 - $40.00

Running

5K

Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

10 Oct, 2026 (Sat) – 28 Nov, 2026

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Durango Marathon

Durango, Colorado, United States

11 Oct, 2026 (Sun)

$30.00 - $140.00

Running

Marathon Half-Marathon 5K

Westy Half & 5k

Westminster, Colorado, United States

11 Oct, 2026 (Sun)

$40.00 - $65.00

Running

Half-Marathon 5K

Blue Sky Trail Marathon & Half Marathon

Fort Collins, Colorado, United States

17 Oct, 2026 (Sat) – 18 Oct, 2026

$100.00 - $120.00

Trail running

43K 22.2K

The Great Trailhead Foot Race 5 & 10 Miler

Lakewood, Colorado, United States

17 Oct, 2026 (Sat)

$65.00 - $70.00

Running

8K 16.1K

Witch Paddle

Littleton, Colorado, United States

17 Oct, 2026 (Sat)

Indian Creek Trail Runs

Sedalia, Colorado, United States

17 Oct, 2026 (Sat)

$50.00 - $160.00

Trail running

8.9K 24.1K Ultra

Race to Cure Sarcoma Denver

Denver, Colorado, United States

24 Oct, 2026 (Sat)

$10.00 - $35.00

Running

5K 1K +2

YMCA of Pueblo Spooky Sprint 5K

Pueblo, Colorado, United States

24 Oct, 2026 (Sat)

$30.00

Running

5K

Apex Foundation Trick or Trot 5K & Halloween Hunt

Arvada, Colorado, United States

24 Oct, 2026 (Sat)

$10.00 - $35.00

Running

5K 1.6K

The 14th Annual Odyssey Odyssey - 2026

Denver, Colorado, United States

25 Oct, 2026 (Sun)

Free

Running

5K 1.6K