Running Races in Frederick, Colorado 2026 | Browse All Races

There are 3 running races in Frederick, Colorado in 2026. The next is the CEROX IRON + IRON X on May 9.

Sat, May 9 · Frederick, CO Frederick

Cerox Iron IndividualCerox Iron Teams of 2Cerox Iron X Teams of 2 +1

From $45 Open

Sat, Jul 25 · Frederick, CO Frederick

Cerox Iron IndividualCerox IndividualCerox Teams of 2 +1

From $45 Open

Sat, Aug 22 · Frederick, CO Frederick

Cerox Iron IndividualCerox Iron X Teams of 2Cerox Iron X Individual +1

From $45 Open

Running Races in Frederick, Colorado — 2026