Clear All
Half Marathons Near Colorado
Showing the next 50 runs that match your filters
Featured
Hot Chocolate Run - Denver
Get 15% Off - Use Code RGCO
Date: Oct 4, 2026 - Sunday
Size: 1,000 - 5,000 participants
Location: Denver, Colorado
Featured
Colorado Springs Marathon, Half, 5K, and Kids K
Get 15% Off - Use Code RunGuides26
Date: Oct 3, 2026 - Saturday
Size: 1,000 - 5,000 participants
Location: Colorado Springs, Colorado
Golden Harvest Half Marathon, 5k & 10k - Denver
Date: Sep 5, 2026 - Saturday
Size: 100 - 500 participants
Location: Westminster, Colorado
Golden Harvest Half Marathon, 5k & 10k - Colorado Springs
Date: Sep 6, 2026 - Sunday
Size: 100 - 500 participants
Location: Colorado Springs, Colorado
Labor Day Half Marathon, 10K and 5K
Date: Sep 7, 2026 - Monday
Size: 500 - 1,000 participants
Location: Parker, Colorado
Are you organizing a running event?
Black Squirrel Half
Date: Sep 12, 2026 - Saturday
Size: 100 - 500 participants
Location: Bellvue, Colorado
Snow Mtn Ranch Trail Festival
Date: Sep 12, 2026 - Saturday
Size: 100 - 500 participants
Location: Grand County, Colorado
Ned Ned Trail Fest
Date: Sep 12, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Nederland, Colorado
Snow Mountain Ranch Trail Running Festival
Date: Sep 12, 2026 - Saturday
Size: 100 - 500 participants
Location: Grand Lake, Colorado
Ned Ned Half Marathon
Date: Sep 12, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Nederland, Colorado
National Chocolate Day Run for Chocolates 5K/10K/13.1 - Denver/Aurora
Date: Sep 12, 2026 - Saturday
Size: 100 - 500 participants
Location: Centennial, Colorado
Nun Run
Date: Sep 13, 2026 - Sunday
Size: 500 - 1,000 participants
Location: Centennial, Colorado
All-Out Fallfest
Date: Sep 19, 2026 - Saturday
Size: 100 - 500 participants
Location: Westminster, Colorado
Beulah Challenge
Date: Sep 19, 2026 - Saturday
Size: 100 - 500 participants
Location: Beulah, Colorado
Autumn Run
Date: Sep 19, 2026 - Saturday
Size: 100 - 500 participants
Location: Buena Vista, Colorado
Fall Equinox Marathon, Half Marathon & 5 Mile
Date: Sep 20, 2026 - Sunday
Size: 100 - 500 participants
Location: Fort Collins, Colorado
Red Feather Trail Jamboree
Date: Sep 25-27, 2026 - Friday to Sunday
Size: 100 - 500 participants
Location: Goodell Corner, Colorado
Monument Marathon
Date: Sep 26, 2026 - Saturday
Size: 100 - 500 participants
Location: Gering, Nebraska
Wild Wahatoya Runs
Get 10% Off - Use Code RUNGUIDE10
Date: Sep 26, 2026 - Saturday
Size: 100 - 500 participants
Location: La Veta, Colorado
Oktoberfest Run 5K/10K/13.1 - Denver/Aurora
Date: Sep 26, 2026 - Saturday
Size: 100 - 500 participants
Location: Centennial, Colorado
Boulderthon: Boulder Marathon
Date: Sep 27, 2026 - Sunday
Size: 10,000+ participants
Location: Boulder, Colorado
Mainly Marathons Center of the Nation Series - Day 1
Date: Sep 28, 2026 - Monday
Size: 1 - 100 participants
Location: Cheyenne, Wyoming
Colorado Springs Marathon, Half, 5K, and Kids K
Get 15% Off - Use Code RunGuides26
Date: Oct 3, 2026 - Saturday
Size: 1,000 - 5,000 participants
Location: Colorado Springs, Colorado
The Bear Chase Trail Races
Date: Oct 3-4, 2026 - Saturday to Sunday
Size: 100 - 500 participants
Location: Lakewood, Colorado
Spooky Sprint - Denver
Date: Oct 3, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Littleton, Colorado
Rim to Rim Royal Gorge Race
Date: Oct 3, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Fremont County, Colorado
Windsor Marathon, Half Marathon, 10k & 5k
Date: Oct 4, 2026 - Sunday
Size: 500 - 1,000 participants
Location: Windsor, Colorado
Run for Beer - New Belgium Brewing Half Marathon & 5k
Date: Oct 4, 2026 - Sunday
Size: 100 - 500 participants
Location: Severance, Colorado
Long View Marathon & Half Marathon
Date: Oct 10, 2026 - Saturday
Size: 100 - 500 participants
Location: Fort Collins, Colorado
Breckenridge Road Marathon
Date: Oct 10-11, 2026 - Saturday to Sunday
Size: 100 - 500 participants
Location: Breckenridge, Colorado
Bagel Run 5K/10K/13.1 - Denver/Aurora
Date: Oct 10, 2026 - Saturday
Size: 100 - 500 participants
Location: Centennial, Colorado
Westy Half & 5k
Date: Oct 11, 2026 - Sunday
Size: 100 - 500 participants
Location: Westminster, Colorado
Blue Sky Trail Marathon
Date: Oct 17-18, 2026 - Saturday to Sunday
Size: 100 - 500 participants
Location: Fort Collins, Colorado
Spooky Sprint - Colorado Springs
Date: Oct 31, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Colorado Springs, Colorado
Halloween Trick or Trot Run 5K/10K/13.1 - Denver/ Aurora
Date: Oct 31, 2026 - Saturday
Size: 100 - 500 participants
Location: Centennial, Colorado
All-Out Kooky-Spooky
Date: Nov 1, 2026 - Sunday
Size: 500 - 1,000 participants
Location: Arvada, Colorado
Louisville Trail Race
Date: Nov 14, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Louisville, Colorado
Run for Mental Health 5K/10K/13.1 - Denver/Aurora
Date: Nov 14, 2026 - Saturday
Size: 100 - 500 participants
Location: Centennial, Colorado
TURKEY TREK (13.1, 10k, 5k & 2k)
Date: Nov 21, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Arvada, Colorado
Colorado Cold Rush
Date: Nov 21, 2026 - Saturday
Size: 100 - 500 participants
Location: Colorado Springs, Colorado
Coffee Lovers Run 5K/10K/13.1 - Denver/Aurora
Date: Nov 28, 2026 - Saturday
Size: 100 - 500 participants
Location: Centennial, Colorado
All-Out Fa La La
Date: Dec 5, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Westminster, Colorado
Run for Breast Cancer 5K/10K/13.1 - Denver/Aurora
Date: Dec 12, 2026 - Saturday
Size: 100 - 500 participants
Location: Centennial, Colorado
A Merry Christmas Run 5K/10K/13.1 - Denver/Aurora
Date: Dec 26, 2026 - Saturday
Size: 100 - 500 participants
Location: Centennial, Colorado
All-Out Polar Prowl
Date: Jan 9, 2027 - Saturday
Size: 100 - 500 participants
Location: Arvada, Colorado
MLK Jr. Freedom Run 5K/10K/13.1 - Denver/Aurora
Date: Jan 16, 2027 - Saturday
Size: 100 - 500 participants
Location: Centennial, Colorado
MLK Freedom Run 5K/10K/13.1 - Denver/Aurora
Date: Jan, 2027 (TBD)
Size: 100 - 500 participants
Location: Centennial, Colorado
Chilly Willy 5K/10K/Half Marathon - Colorado Springs
Date: Jan 23, 2027 - Saturday
Size: 100 - 500 participants
Location: Colorado Springs, Colorado
Coffee Lover Run 5K/10K/13.1 - Denver/Aurora
Date: Jan 30, 2027 - Saturday
Size: 100 - 500 participants
Location: Centennial, Colorado
All-Out Mardi Crawl
Date: Feb 6, 2027 - Saturday
Size: 100 - 500 participants
Location: Arvada, Colorado
Stories Ultra
Date: Feb 6-7, 2027 - Saturday to Sunday
Size: 100 - 500 participants
Location: Colorado Springs, Colorado
Lunar New Year Run 5K/10K/13.1 - Denver/Aurora
Date: Feb, 2027 (TBD)
Size: 100 - 500 participants
Location: Centennial, Colorado
