Upcoming Races Near Castle Rock, CO in April, 2026

Name: Dash & Dine 5k
Start: 2026-04-28
End: 2026-04-28
Location: Boulder

Three Creeks Half Marathon

Englewood, CO

Sunday, April 5th, 2026

Featured

Half

Trail

Fast

View details for race Three Creeks Half Marathon

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Hot Laps - Denver

Denver, CO

Thursday, April 9th, 2026

View details for race Hot Laps - Denver

Dash for Detection: Oral Cancer Awareness 5K

Denver, CO

Saturday, April 11th, 2026

View details for race Dash for Detection: Oral Cancer Awareness 5K

Run Through The Decades 6K/7K/8K/Half - Colorad...

Colorado Springs, CO

Saturday, April 11th, 2026

Half

View details for race Run Through The Decades 6K/7K/8K/Half - Colorado Springs

RMRR Spring Marathon Training Series #2

Thornton, CO

Saturday, April 11th, 2026

10 Miles

Ultra

View details for race RMRR Spring Marathon Training Series #2

Rockin on the River 5K

Littleton, CO

Saturday, April 11th, 2026

View details for race Rockin on the River 5K

Spring Fling Prairie Dog Half, 10k, & 5k

Arvada, CO

Sunday, April 12th, 2026

Half

10K

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

Healthy Kids Running Series Spring 2026 - Auror...

Aurora, CO

Sunday, April 12th, 2026

View details for race Healthy Kids Running Series Spring 2026 - Aurora, CO

Donut Dash

Denver, CO

Sunday, April 12th, 2026

Fast

View details for race Donut Dash

Healthy Kids Running Series Spring 2026 - Denve...

Denver, CO

Sunday, April 12th, 2026

View details for race Healthy Kids Running Series Spring 2026 - Denver, CO

Hop Into Spring 5K - Denver

Denver, CO

Sunday, April 12th, 2026

View details for race Hop Into Spring 5K - Denver

RMRR April Trophy Series

Denver, CO

Sunday, April 12th, 2026

View details for race RMRR April Trophy Series

Platte River Half-Marathon and Relay

Littleton, CO

Sunday, April 12th, 2026

Half

Trail

View details for race Platte River Half-Marathon and Relay

Prairie Dog Run Series

Louisville, CO

Sunday, April 12th, 2026

Half

View details for race Prairie Dog Run Series

Donot Stop Half Marathon (5k/10k) - Colorado Sp...

Colorado Springs, CO

Saturday, April 18th, 2026

10K

1 Mile

View details for race Donot Stop Half Marathon (5k/10k) - Colorado Springs

Kerr Gulch Amble

Evergreen, CO

Saturday, April 18th, 2026

View details for race Kerr Gulch Amble

Woody's Tortoise And Hare

Fountain, CO

Saturday, April 18th, 2026

Fast

View details for race Woody's Tortoise And Hare

All-Out Beat the Heat

Westminster, CO

Saturday, April 18th, 2026

Half

10K

Trail

View details for race All-Out Beat the Heat

DoNot Stop Half Marathon (5k/10k) - Denver

Littleton, CO

Sunday, April 19th, 2026

10K

1 Mile

View details for race DoNot Stop Half Marathon (5k/10k) - Denver

2026 Fairmount Fit Fest

Golden, CO

Sunday, April 19th, 2026

View details for race 2026 Fairmount Fit Fest

Alpine Autism Center 19th Annual "Run for the O...

Colorado Springs, CO

Saturday, April 25th, 2026

View details for race Alpine Autism Center 19th Annual "Run for the One" 5k Walk/Run

Runs With Scissors Races

Brighton, CO

Saturday, April 25th, 2026

Half

Marathon

Ultra

View details for race Runs With Scissors Races

Blue Heron Half & 5K

Brighton, CO

Sunday, April 26th, 2026

Half

Fast

View details for race Blue Heron Half & 5K

Unicorn 5k (Denver-East)

Denver, CO

Sunday, April 26th, 2026

View details for race Unicorn 5k (Denver-East)

Dash & Dine 5k

Boulder, CO

Tuesday, April 28th, 2026

View details for race Dash & Dine 5k

Explore more in Castle Rock, CO

Distances:

5K 10K Half Marathon Marathon

Months:

February March April

Tags:

Trail Boston Qualifiers Fast Courses

State:

All Colorado races

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