Race Calendar in Colorado, United States

Donut Dash

Denver, Colorado, United States

Apr 4, 2027 (Sun)

$30.00

Running

5K

Platte River Half-Marathon, Relay & 5k

Littleton, Colorado, United States

Apr 7, 2027 (Wed) – Apr 11, 2027

Running

Half-Marathon 5K

NoCo Urban Ultra & Relay

Bellvue, Colorado, United States

Apr 11, 2027 (Sun)

$105.00 - $150.00

Trail running

Ultra

Horsetooth Half Marathon - Presented by Fort Collins Connexion

Fort Collins, Colorado, United States

Apr 18, 2027 (Sun)

$75.00

Running

Half-Marathon

All-Out Beat the Heat

Westminster, Colorado, United States

Apr 24, 2027 (Sat)

$20.00 - $65.00

Running

Half-Marathon 10K 5K +2

Unicorn 5k (Denver-East)

Denver, Colorado, United States

Apr 25, 2027 (Sun)

$15.00 - $36.00

Running

5K 3.2K

The Colorado Marathon

Fort Collins, Colorado, United States

May 2, 2027 (Sun)

Running

Marathon Half-Marathon 5K 10K

RoC & Roll 5K: Run, Walk, or Wheel

Fountain, Colorado, United States

Aug 7, 2027 (Sat)

Running

5K

50 States Half Marathon Club General Membership

Colorado Springs, Colorado, United States

Feb 10, 2034 (Fri)

$85.00

Running

Half-Marathon

Fifty States Half Marathon Club Life Membership

Colorado Springs, Colorado, United States

Feb 11, 2034 (Sat)

$429.00

Running

Half-Marathon

The Triple Bypass

Evergreen, Colorado, United States

Jul 11, 2026 (Sat)

Cycling

Ultra

Heatwave Half Marathon - Denver

Littleton, Colorado, United States

Jul 11, 2026 (Sat)

Running

1.6K 5K 10K Half-Marathon +1