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Frederick, CO · August 22, 2026 · RunningExternal event
CEROX IRON + IRON X 2026
Frederick, CO · August 22, 2026 · Running
DateAugust 22, 2026
LocationFrederick, CO
DisciplineRunning
RegistrationExternalorganizer site
Price$45
Divisions
Cerox Iron IndividualDistance
Cerox Iron Teams of 2Distance
Cerox Iron X IndividualDistance
Cerox Iron X Teams of 2Distance
About the race
The race.
Cerox Iron and Cerox Iron X are functional fitness challenges held in Frederick, CO on August 22, 2026. Participants navigate eight fitness zones featuring rowing, skiing, deadlifts, sandbag work, lunges, farmer carries, bike calories, and burpees. Cerox Iron X doubles the repetitions and distances compared to Cerox Iron. Both events offer individual and two-person team divisions, with teams able to distribute the zone work as they choose. Estimated wave start times are 11 AM for Iron X Individual, 12 PM for Iron Individual, 1 PM for Iron X Teams, and 2 PM for Iron Teams.
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