5K Races in Thornton, Colorado 2026 — MyNextRace

There are 2 5K races in Thornton, Colorado in 2026. The next is the I Ain't Scared (of 5k) on October 31.

Sat, Oct 31 · Thornton, CO Thornton

Road 5k

From $29 Open

Sat, Jun 19 · Thornton, CO Thornton

Road 1/2 (ish) Mile Saunter - untimed1/2 (ish) Mile Saunter - untimed5k Run/Walk +1

From $16 Open

5K Races in Thornton, Colorado