Upcoming Half Marathon Races Near Northglenn, CO

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All-Out Summer Breeze

Arvada, CO

Saturday, June 13th, 2026

Half

10K

Trail

View details for race All-Out Summer Breeze

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

Windsor, CO

Saturday, June 20th, 2026

10K

Half

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

6th Annual July 4th ROCK-IT RUN

Castle Rock, CO

Saturday, July 4th, 2026

Half

View details for race 6th Annual July 4th ROCK-IT RUN

All-Out Dog Days

Westminster, CO

Saturday, July 11th, 2026

Half

10K

Trail

View details for race All-Out Dog Days

Heatwave Half Marathon - Denver

Littleton, CO

Saturday, July 11th, 2026

1 Mile

10K

View details for race Heatwave Half Marathon - Denver

Heatwave Half Marathon - Denver

Denver, CO

Saturday, July 11th, 2026

1 Mile

10K

View details for race Heatwave Half Marathon - Denver

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

Castle Rock, CO

Saturday, July 18th, 2026

Half

10K

Trail

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

Bound for Boston Marathon & Half Marathon - Denver

Denver, CO

Sunday, August 2nd, 2026

Marathon

Half

Fast

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

Choice City Running Festival

Fort Collins, CO

Friday, August 7th, 2026

1 Mile

Half

10K

View details for race Choice City Running Festival

All-Out Runapalooza

Arvada, CO

Saturday, August 8th, 2026

Half

10K

Trail

View details for race All-Out Runapalooza

Erie Half & 5k

Erie, CO

Sunday, August 16th, 2026

Half

View details for race Erie Half & 5k

Byers Peak Stampede Half Marathon & 5K Run

Fraser, CO

Saturday, August 22nd, 2026

Half

Trail

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

Staunton Rocks! Marathon and Half Marathon

Pine, CO

Saturday, August 22nd, 2026

Marathon

Half

Trail

View details for race Staunton Rocks! Marathon and Half Marathon

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

Sunday, August 23rd, 2026

Half

10K

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

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

Westminster, CO

Saturday, September 5th, 2026

1 Mile

10K

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

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

Denver, CO

Saturday, September 5th, 2026

1 Mile

10K

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

Labor Day Half Marathon

Parker, CO

Monday, September 7th, 2026

Half

10K

Fast

View details for race Labor Day Half Marathon

All-Out Fall Fest

Westminster, CO

Saturday, September 19th, 2026

Half

10K

Trail

View details for race All-Out Fall Fest

Fall Equinox

Fort Collins, CO

Sunday, September 20th, 2026

Half

Fast

View details for race Fall Equinox

Running for Children's Rights to Both Parents -...

Boulder, CO

Sunday, September 27th, 2026

Half

10K

View details for race Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado

Spooky Sprint - Denver

Littleton, CO

Saturday, October 3rd, 2026

1 Mile

10K

View details for race Spooky Sprint - Denver

Spooky Sprint - Denver

Denver, CO

Saturday, October 3rd, 2026

1 Mile

10K

View details for race Spooky Sprint - Denver

Windsor Marathon, Half Marathon, 10k, 5k & 1 Mi...

Windsor, CO

Sunday, October 4th, 2026

Marathon

Half

10K

Trail

View details for race Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run

The Long View Marathon

Fort Collins, CO

Saturday, October 10th, 2026

Marathon

Half

View details for race The Long View Marathon

Westy Half & 5k

Westminster, CO

Sunday, October 11th, 2026

Half

View details for race Westy Half & 5k

All-Out Kooky-Spooky

Golden, CO

Sunday, November 1st, 2026

Half

10K

Trail

View details for race All-Out Kooky-Spooky

Turkey Trails- Denver

Lakewood, CO

Saturday, November 7th, 2026

1 Mile

10K

View details for race Turkey Trails- Denver

Turkey Trails- Denver

Littleton, CO

Saturday, November 7th, 2026

1 Mile

10K

View details for race Turkey Trails- Denver

Turkey Trails- Denver

Denver, CO

Saturday, November 7th, 2026

1 Mile

10K

View details for race Turkey Trails- Denver

HRCA Backcountry Wilderness Half Marathon

Lone Tree, CO

Saturday, November 7th, 2026

Half

Trail

View details for race HRCA Backcountry Wilderness Half Marathon

TURKEY TREK (13.1, 10k, 5k & 2k)

Arvada, CO

Saturday, November 21st, 2026

Half

10K

View details for race TURKEY TREK (13.1, 10k, 5k & 2k)

All-Out Fa La La

Westminster, CO

Saturday, December 5th, 2026

Half

10K

Trail

View details for race All-Out Fa La La

All-Out Polar Prowl

Arvada, CO

Saturday, January 9th, 2027

Half

10K

Trail

View details for race All-Out Polar Prowl

All-Out Mardi Crawl

Arvada, CO

Saturday, February 6th, 2027

Half

10K

Trail

View details for race All-Out Mardi Crawl

Lucky Brew Race 5K, 10K, 15k & Half Marathon

Severance, CO

Sunday, March 14th, 2027

10K

15K

View details for race Lucky Brew Race 5K, 10K, 15k & Half Marathon

All-Out Spring Fever

Golden, CO

Sunday, March 21st, 2027

Half

10K

Trail

View details for race All-Out Spring Fever

Platte River Half-Marathon, Relay & 5k

Littleton, CO

Sunday, April 11th, 2027

Half

View details for race Platte River Half-Marathon, Relay & 5k

All-Out Beat the Heat

Westminster, CO

Saturday, April 24th, 2027

Half

10K

Trail

View details for race All-Out Beat the Heat

The Colorado Marathon

Fort Collins, CO

Sunday, May 2nd, 2027

Marathon

Half

10K

View details for race The Colorado Marathon

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