EVENTS

May 2025

Sat 3

May 3 @ 7:00 am - 10:00 am

Greenland Trail 50K, 25K, 8 Mile & 4 Mile 2025

Greenland Open Space Larkspur, CO, United States

Greenland Trail Races
May 3, 2025
Larkspur, CO

$25 – $85

Sat 3

May 3 @ 9:00 am - 11:30 am

Duck Waddle 5K 2025

Lake Estes Trail Near Parking Structure, Estes Park, CO, United States

Duck Waddle 5K
May 3, 2025
Estes Park, Colorado

$25 – $35

Sun 4

May 4 @ 8:30 am - 11:30 am

Fight For Air Climb Detroit 2025

Comerica Park Detroit, MI, United States

Fight For Air Climb Detroit
May 4, 2025
Comerica Park
Detriot, MI

$25 – $125

Sun 4

May 4 @ 9:00 am - 11:00 am

Emerge 5K 2025

Boulder Reservoir 5565 N 51st St,, Boulder, CO, United States

Emerge 5K
May 4, 2025
Boulder Reservoir

Sat 17

May 17 @ 9:00 am - 12:00 pm

Colfax 5K 2025

City Park 2001 Colorado Blvd, Denver, CO, United States

Colfax 5K
May 17th, 2025
Denver, Colorado

$49

Sun 18

May 18 @ 6:00 am - 1:00 pm

Colfax Marathon Events 2025

City Park 2001 Colorado Blvd, Denver, CO, United States

Colfax Marathon Events
May 18th, 2025
Denver, Colorado

$49

Mon 26

May 26 @ 7:00 am - 2:00 pm

Bolder Boulder 2025

Bolder Boulder 10K
May 26th, 2025
Boulder, Colorado

$15 – $90

June 2025

Sun 1

June 1 @ 8:00 am - 8:30 am

Flamingo Day 5K 2025

Sloan's Lake Park

June 1st, 2025
Sloans Lake
Denver, Colorado

$32 – $40

Sat 7

June 7 @ 10:00 am - 1:00 pm

Walk to Cure Arthritis 2025

Hudson Gardens 6115 S Santa Fe Dr, Littleton, CO, United States

Arthritis Walk For Hope
Hudson Gardens Littleton,Co
June 7, 2025

$50

Sat 14

June 14 @ 5:00 am - 9:00 am

Estes Park Marathon, 1/2 Marathon, and Kids Fun Run 2025

Estes Park High School 1600 Manford Ave, Estes Park, CO, United States

Estes Park Marathon, 1/2 Marathon, and Kids Fun Run
June 15, 2025
Estes Park, CO

$35 – $115