5K races near Boulder, Colorado — 2026 running calendar

Run for the River 5k Boulder

Boulder, Colorado, United States

20 Jun, 2026 (Sat)

$25.00

Running

5K

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

Boulder, Colorado, United States

21 Jun, 2026 (Sun)

$30.00

Running

5K

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

Boulder, Colorado, United States

21 Jun, 2026 (Sun)

$30.00

Running

5K

BRR All-Comers Summer Track & Field Series #3

Boulder, Colorado, United States

09 Jul, 2026 (Thu)

$20.00

Running

Ultra 1.6K 5K +1

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

Boulder, Colorado, United States

27 Sep, 2026 (Sun)

$40.00 - $500.00

Running

Half-Marathon 5K 10K

Emerge 5K

Boulder, Colorado, United States

03 May, 2026 (Sun)

Running

5K

2026 Dash & Dine 5k Run Series

Boulder, Colorado, United States

28 Apr, 2026 (Tue) – 19 May, 2026

Running

5K