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Races in Boulder, CO

Running races in or near Boulder, CO

Marathons, 1-milers, 5Ks, half-marathons, 10Ks & more

See below for a frequently-updated, comprehensive list of upcoming running events in the local Boulder, CO area. Races listed here include both walking and running events of various distances — from 1-milers, to 5Ks, to marathons, and everything else in between.

Fleet Feet Sports

Running / Walking Club

Organization: Westgate Community School

Date of Race: 04-16-2025

Description: Any fitness level welcome

Running-5K - 15 And Under Youth

Organization: Turner Middle School

Date of Race: 05-03-2025

Description: All participants are welcome. Come challenge yourself to be the best.

Bubble Run - Exclusive VIP Registration- Regular Price ...

Organization: Viral Run

Date of Race: 06-21-2025

Description: If you’ve done a traditional 5K, you know ...

Price

Organization: Colorado Track & Cross Country Camps

Date of Race: 07-07-2025

Description: If you’ve done a traditional 5K, you know ...

Elk Meadow 10k Trail Race- June 21

Organization: Evergreen Park & Recreation District

Date of Race: 06-21-2025

Description: DescriptionThis 10K race leads runners throughout the rolling hills of Elk ...

Bergen Peak Half Marathon Trail Race- Sept 13

Organization: Evergreen Park & Recreation District

Date of Race: 09-13-2025

Description: DescriptionBergen Peak runners will experience the rolling hills of Elk Meadow ...

Muddy Dash - VIP Registration 💎

Organization: Viral Run

Date of Race: 05-10-2025

Description: Muddy Dash is not your average mud run! Get ready for ...

Colorado Cross Country Summer Camp

Organization: Colorado Track & Cross Country Camps

Date of Race: 07-07-2025

Description: Nestled 5,430 feet above sea level, Boulder, Colorado is renowned as ...

Running-5K - 16 and Older Adult Registration

Organization: Turner Middle School

Date of Race: 05-03-2025

Description: All participants are welcome. Come challenge yourself to be the best.

Muddy Dash - Value Registration

Organization: Viral Run

Date of Race: 05-10-2025

Description: Muddy Dash is not your average mud run! Get ready for ...

Bubble Run - Value Registrations- Regular Price $54.95

Organization: Viral Run

Date of Race: 06-21-2025

Description: If you’ve done a traditional 5K, you know ...

Muddy Dash | Denver

Organization: Viral Run

Date of Race: 05-10-2025

Description: Muddy Dash is not your average mud run! Get ready for ...

21st Annual Bob Turner Classic 5k Run/Walk

Organization: Turner Middle School

Date of Race: 05-03-2025

Description: All participants are welcome. Come challenge yourself to be the best.

Bubble Run | Denver

Organization: Viral Run

Date of Race: 06-21-2025

Description: If you’ve done a traditional 5K, you know ...

Elk Meadow 5k Trail Race June 21

Organization: Evergreen Park & Recreation District

Date of Race: 06-21-2025

Description: DescriptionThis 5K race leads runners throughout the rolling hills of Elk ...

Staunton State Park 10 Mile Trail Race- Aug ...

Organization: Evergreen Park & Recreation District

Date of Race: 08-02-2025

Description: DescriptionJoin us at Staunton State Park for a beautiful 10 mile ...

EXPAND: Youth Track and Field

Organization: BOULDER PARKS & RECREATION (w)

Date of Race: 04-02-2025

Description: Description(Ages 6–14) Whether you want to run, throw or jump, there's ...

Staunton State Park 6 Mile Trail Race- July ...

Organization: Evergreen Park & Recreation District

Date of Race: 07-12-2025

Description: DescriptionJoin us at Staunton State Park for a beautiful 6 mile ...

Bergen Peak 5k Trail Race- Sept 13

Organization: Evergreen Park & Recreation District

Date of Race: 09-13-2025

Description: DescriptionThis 5K race leads runners throughout the rolling hills of Elk ...

5k Race June

Organization: Fort Lupton Recreation Center

Date of Race: 06-14-2025

Description: DescriptionA certified 5k Race starts on South Harrison Avenue in front ...

EXPAND: Special Olympics Track and Field

Organization: BOULDER PARKS & RECREATION (w)

Date of Race: 04-02-2025

Description: Description(Ages 6–14) Whether you want to run, throw or jump, there's ...

2025 Wicked Wine Run Denver, CO

Organization: Wicked Wine Run

Date of Race: 05-10-2025

Description: Whether you’re a seasoned runner or just love to walk and ...

EXPAND: 5k Club

Organization: BOULDER PARKS & RECREATION (w)

Date of Race: 04-03-2025

Description: Description(Ages 14+) It's a great time to enjoy the beautiful spring ...

1K TASTING WALK - Individual

Organization: Wicked Wine Run

Date of Race: 05-10-2025

Description: Whether you’re a seasoned runner or just love to walk and ...

Volunteer then Run! - Individual

Organization: Wicked Wine Run

Date of Race: 05-10-2025

Description: Whether you’re a seasoned runner or just love to walk and ...

Saucony

Complete list of running events in and near Boulder, CO: Marathons, 1-milers, 5Ks, half-marathons, 10Ks, obstacle courses, walking events & more.


More information about Boulder

About Boulder

Boulder (CO) is a city in Boulder County with an estimated population of 97,385.[4]

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Did you know?

There were at least 768 marathons scheduled in the United States and Canada in 2016.

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