Upcoming Half Marathon Races Near Denver, CO

Name: Platte River Half-Marathon and Relay
Start: 2026-04-12
End: 2026-04-12
Location: Littleton

Red, White and Brew 5k, 10k, Half Marathon & 12...

Windsor, CO

Saturday, June 21st, 2025

10K

Half

View details for race Red, White and Brew 5k, 10k, Half Marathon & 12 Hour Last Person Standing

Hometown Half Marathon & 5k/10k - Denver

Denver, CO

Saturday, June 21st, 2025

10K

1 Mile

View details for race Hometown Half Marathon & 5k/10k - Denver

Hometown Half Marathon & 5k/10k - Denver

Westminster, CO

Saturday, June 21st, 2025

10K

Half

View details for race Hometown Half Marathon & 5k/10k - Denver

Hometown Half Marathon & 5k/10k - Colorado Springs

Colorado Springs, CO

Sunday, June 22nd, 2025

10K

Half

View details for race Hometown Half Marathon & 5k/10k - Colorado Springs

5th Annual July 4th ROCK-IT RUN

Castle Rock, CO

Friday, July 4th, 2025

Half

View details for race 5th Annual July 4th ROCK-IT RUN

Fleet Feet Denver Fall Half-Marathon Twelve-Wee...

Littleton, CO

Tuesday, July 8th, 2025

Half

View details for race Fleet Feet Denver Fall Half-Marathon Twelve-Week Training Program

All-Out Dog Days

Westminster, CO

Saturday, July 12th, 2025

Half

10K

Trail

View details for race All-Out Dog Days

Summer Splash Prairie Dog Half, 10k, & 5k

Castle Rock, CO

Saturday, July 19th, 2025

Half

10K

Trail

View details for race Summer Splash Prairie Dog Half, 10k, & 5k

Rocky Mountain Half Marathon & 5K

Estes Park, CO

Friday, August 1st, 2025

10K

Half

View details for race Rocky Mountain Half Marathon & 5K

Hero Hustle Colorado Springs

Colorado Springs, CO

Saturday, August 2nd, 2025

10K

Half

View details for race Hero Hustle Colorado Springs

All-Out Runapalooza

Arvada, CO

Saturday, August 2nd, 2025

Half

10K

Trail

View details for race All-Out Runapalooza

Popsicle 5K/10K/Half - Colorado Springs

Colorado Springs, CO

Saturday, August 2nd, 2025

10K

Half

Trail

View details for race Popsicle 5K/10K/Half - Colorado Springs

Bound for Boston Marathon & Half Marathon - Denver

Denver, CO

Sunday, August 3rd, 2025

Marathon

Half

Fast

View details for race Bound for Boston Marathon & Half Marathon - Denver

Choice City Running Festival

Fort Collins, CO

Friday, August 8th, 2025

1 Mile

10K

View details for race Choice City Running Festival

Erie Half & 5k

Erie, CO

Sunday, August 17th, 2025

Half

View details for race Erie Half & 5k

Byers Peak Stampede Half Marathon & 5K Run

Fraser, CO

Saturday, August 23rd, 2025

Half

View details for race Byers Peak Stampede Half Marathon & 5K Run

Staunton Rocks! Marathon & Half

Conifer, CO

Saturday, August 23rd, 2025

Half

Marathon

Trail

View details for race Staunton Rocks! Marathon & Half

Staunton Rocks! Marathon and Half Marathon

Pine, CO

Saturday, August 23rd, 2025

Marathon

Half

Trail

View details for race Staunton Rocks! Marathon and Half Marathon

Calarat Challenge Trail Running Festival

Jamestown, CO

Saturday, August 30th, 2025

Half

10K

Trail

View details for race Calarat Challenge Trail Running Festival

Labor Day Half Marathon

Parker, CO

Monday, September 1st, 2025

Half

10K

Fast

View details for race Labor Day Half Marathon

Black Squirrel Half Marathon

Bellvue, CO

Saturday, September 6th, 2025

Half

Trail

View details for race Black Squirrel Half Marathon

National Chocolate Day: Run for Chocolates DENV...

Centennial, CO

Saturday, September 13th, 2025

10K

Half

View details for race National Chocolate Day: Run for Chocolates DENVER/AURORA

Trail Sisters Women's Half Marathon & 10k

Buena Vista, CO

Saturday, September 13th, 2025

Half

10K

Trail

View details for race Trail Sisters Women's Half Marathon & 10k

All-Out Fall Fest

Westminster, CO

Saturday, September 13th, 2025

Half

10K

Trail

View details for race All-Out Fall Fest

Fall Equinox

Fort Collins, CO

Sunday, September 14th, 2025

Marathon

Half

Fast

View details for race Fall Equinox

Spooky Sprint - Denver

Littleton, CO

Sunday, September 14th, 2025

1 Mile

10K

View details for race Spooky Sprint - Denver

Spooky Sprint - Denver

Denver, CO

Sunday, September 14th, 2025

10K

1 Mile

View details for race Spooky Sprint - Denver

Autumn Run

Buena Vista, CO

Saturday, September 20th, 2025

Half

10K

View details for race Autumn Run

Rim to Rim Royal Gorge Races: 5K Road Run, Trai...

Canon City, CO

Saturday, September 20th, 2025

Half

10K

Trail

View details for race Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon

13th Annual Superhero Event

Greeley, CO

Saturday, September 20th, 2025

10K

1 Mile

View details for race 13th Annual Superhero Event

Red Feather Trail Jamboree

Red Feather Lakes, CO

Friday, September 26th, 2025

Half

Ultra

Trail

View details for race Red Feather Trail Jamboree

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

Saturday, September 27th, 2025

10K

Half

View details for race Pioneer Prairie Dog Half, 10k & 5k

National Singles Day: Singles & Friends Running...

Centennial, CO

Saturday, September 27th, 2025

10K

Half

View details for race National Singles Day: Singles & Friends Running DENVER/AURORA

National Coffee Day: Run for Coffee DENVER/AURORA

Centennial, CO

Saturday, September 27th, 2025

10K

Half

View details for race National Coffee Day: Run for Coffee DENVER/AURORA

Colorado Springs Marathon, Half, 5K, and Kids K

Colorado Springs, CO

Saturday, October 4th, 2025

Marathon

Half

Trail

View details for race Colorado Springs Marathon, Half, 5K, and Kids K

Windsor Marathon, Half Marathon, 10k & 5k

Windsor, CO

Sunday, October 5th, 2025

Marathon

Half

10K

Trail

View details for race Windsor Marathon, Half Marathon, 10k & 5k

Layafette Music Fest Half-Marathon/10K/5K

Louisville, CO

Sunday, October 5th, 2025

Half

View details for race Layafette Music Fest Half-Marathon/10K/5K

The Long View Marathon

Fort Collins, CO

Saturday, October 11th, 2025

Half

Marathon

View details for race The Long View Marathon

Westy Half & 5k

Westminster, CO

Sunday, October 12th, 2025

Half

View details for race Westy Half & 5k

Blue Sky Marathon & Half

Fort Collins, CO

Saturday, October 18th, 2025

Half

Marathon

View details for race Blue Sky Marathon & Half

All-Out Kooky-Spooky

Golden, CO

Sunday, November 2nd, 2025

Half

10K

Trail

View details for race All-Out Kooky-Spooky

HRCA Backcountry Wilderness Half Marathon

Lone Tree, CO

Saturday, November 8th, 2025

Half

Trail

View details for race HRCA Backcountry Wilderness Half Marathon

10k Turkey Trek & 5k Turkey Trot - Now With HAL...

Arvada, CO

Saturday, November 22nd, 2025

10K

Half

Trail

View details for race 10k Turkey Trek & 5k Turkey Trot - Now With HALF MARATHON DISTANCE!

All-Out Fa La La

Westminster, CO

Saturday, December 6th, 2025

Half

10K

Trail

View details for race All-Out Fa La La

All-Out Polar Prowl

Arvada, CO

Saturday, January 10th, 2026

Half

10K

Trail

View details for race All-Out Polar Prowl

Arctic Prairie Dog Half, 10k & 5k

Louisville, CO

Sunday, January 18th, 2026

Half

10K

View details for race Arctic Prairie Dog Half, 10k & 5k

Super Half Marathon™ & Game Day 5K™ Presented b...

Colorado Springs, CO

Sunday, February 8th, 2026

Half

Fast

View details for race Super Half Marathon™ & Game Day 5K™ Presented by Toyota

All-Out Mardi Crawl

Arvada, CO

Sunday, February 22nd, 2026

Half

10K

Trail

View details for race All-Out Mardi Crawl

All-Out Spring Fever

Golden, CO

Sunday, March 22nd, 2026

Half

10K

Trail

View details for race All-Out Spring Fever

Platte River Half-Marathon and Relay

Littleton, CO

Sunday, April 12th, 2026

Half

Trail

View details for race Platte River Half-Marathon and Relay

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