5K races near Boulder, Colorado — 2026 running calendar

Oct

24

World Run Day Virtual 5K - Boulder

Boulder, Colorado, United States

$19.99

Running

5K

Oct

31

Colleen De Reuck XC Classic

Boulder, Colorado, United States

$15.00 - $25.00

Running

5K 3K 1K

Nov

26

Alpine Bank Boulder Thanksgiving Day 5K

Boulder, Colorado, United States

$20.00 - $40.00

Running

5K Ultra

Dec

31

Hands & Voices New Year Virtual 5K: Trails to the Summit

Boulder, Colorado, United States

$35.00

Running

5K

May

02

Emerge 5K

Boulder, Colorado, United States

Free

Running

5K

Jun

12

Alpha 5K Challenge

Boulder, Colorado, United States

Running

5K

Oct

10

Boulder XC Series Meet 1

Boulder, Colorado, United States

Running

5K 3K 1K

Oct

03

Pat Patten Invitational

Boulder, Colorado, United States

Running

5K 1.6K

Sep

27

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

Boulder, Colorado, United States

Running

Half-Marathon 5K 10K

Jul

09

BRR All-Comers Summer Track & Field Series #3

Boulder, Colorado, United States

Running

Ultra 1.6K 5K +1

Jun

21

14th Annual Buffs4Life Kyle MacIntosh Memorial 5K Run/Walk

Boulder, Colorado, United States

Running

5K

Jun

21

Virtual 14th Annual Buffs4Life Kyle MacIntosh Memorial 5K Run/Walk

Boulder, Colorado, United States

Running

5K