Upcoming Half Marathon Races Near Eaton, CO

Name: Erie Half & 5k
Start: 2026-08-16
End: 2026-08-16
Location: Erie

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Calarat Challenge Trail Running Festival

Jamestown, CO

Saturday, August 30th, 2025

Half

10K

Trail

View details for race Calarat Challenge Trail Running Festival

Black Squirrel Half Marathon

Bellvue, CO

Saturday, September 6th, 2025

Half

Trail

View details for race Black Squirrel Half Marathon

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

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

Half

10K

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

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

Windsor, CO

Sunday, October 5th, 2025

Marathon

Half

10K

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

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

Marathon

Half

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 Fa La La

Westminster, CO

Saturday, December 6th, 2025

Half

10K

Trail

View details for race All-Out Fa La La

Arctic Prairie Dog Half, 10k & 5k

Louisville, CO

Sunday, January 18th, 2026

Half

10K

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

All-Out Beat the Heat

Westminster, CO

Saturday, April 18th, 2026

Half

10K

Trail

View details for race All-Out Beat the Heat

Great Western Trail Race

Severance, CO

Saturday, April 18th, 2026

10K

Half

Trail

Fast

View details for race Great Western Trail Race

Horsetooth Half Marathon

Fort Collins, CO

Sunday, April 19th, 2026

Half

Trail

Fast

View details for race Horsetooth Half Marathon

Runs With Scissors Races

Brighton, CO

Saturday, April 25th, 2026

Half

Marathon

Ultra

View details for race Runs With Scissors Races

The Colorado Marathon

Fort Collins, CO

Sunday, May 3rd, 2026

Marathon

Half

10K

View details for race The Colorado Marathon

Longmont Half & 5k (LM Half)

Longmont, CO

Sunday, May 3rd, 2026

Half

View details for race Longmont Half & 5k (LM Half)

Colorado 13er (Half Marathon/10k/5k)

Louisville, CO

Sunday, June 7th, 2026

Half

10K

Trail

View details for race Colorado 13er (Half Marathon/10k/5k)

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

All-Out Dog Days

Westminster, CO

Saturday, July 11th, 2026

Half

10K

Trail

View details for race All-Out Dog Days

Erie Half & 5k

Erie, CO

Sunday, August 16th, 2026

Half

View details for race Erie Half & 5k

Explore more in Eaton, CO

Distances:

5K 10K Half Marathon Marathon

Months:

August September October

Tags:

Trail Boston Qualifiers Fast Courses

State:

All Colorado races

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