Running Race Calendar in Colorado, United States

TBK Bank Thirsty 13 Half Marathon

Durango, Colorado, United States

29 Aug, 2026 (Sat)

$99.00 - $134.00

Running

Half-Marathon

RexRun For PAWSitivity 2026 Trail Run/Walk

Aurora, Colorado, United States

29 Aug, 2026 (Sat)

$20.00 - $45.00

Running, Walking

5K 1.6K

Rocky Mountain 5K presented by School District 11

Colorado Springs, Colorado, United States

29 Aug, 2026 (Sat)

Free - $35.00

Running

5K 1K

Glow & Roll: Illuminate What's Possible

Littleton, Colorado, United States

29 Aug, 2026 (Sat)

$55.00

Running

5K 2.6K

James Test Site

Lyons, Colorado, United States

30 Aug, 2026 (Sun)

Running

5K 10K

Wine Run 5k at The Winery at Holy Cross Abbey

Canon City, Colorado, United States

30 Aug, 2026 (Sun)

$30.00

Running

5K

Break Your Neck: Walk, Run, or Roll

Pueblo, Colorado, United States

05 Sep, 2026 (Sat)

Free

Running

5K 10K

Demon Dash

Arvada, Colorado, United States

05 Sep, 2026 (Sat)

$25.00

Running

5K

Golden Harvest Half Marathon & 5k/10k - Denver

Denver, Colorado, United States

05 Sep, 2026 (Sat)

$22.00 - $67.00

Running

5K 10K Half-Marathon 1.6K

Golden Harvest Half Marathon & 5k/10k - Colorado Springs

Colorado Springs, Colorado, United States

06 Sep, 2026 (Sun)

$22.00 - $54.00

Running

1.6K 5K 10K Half-Marathon

10k at 10,000 Feet

Steamboat Springs, Colorado, United States

06 Sep, 2026 (Sun)

$25.00 - $40.00

Running

12.9K 6.4K

Labor Day Half Marathon

Parker, Colorado, United States

07 Sep, 2026 (Mon)

$33.00 - $75.00

Running

Half-Marathon 10K 5K