Cerox + Iron
Always double-check with the organizer's website! This page may contain affiliate links.
Event Details
The CEROX + IRON event takes place on February 28, 2026, at 3771 Monarch Street in Frederick, Colorado. It is a functional fitness challenge with two main formats: Cerox and Cerox Iron.
Available Formats
Participants can choose from four distinct events:
- Cerox Individual
- Cerox Teams of 2
- Cerox Iron Individual
- Cerox Iron Teams of 2
Both formats feature the same eight fitness zones designed to test endurance and strength. The zones include exercises such as a 400-meter row, deadlifts, a 400-meter ski erg, sandbag lifts, walking lunges, a farmers carry, calories on an Echo bike, and burpees. The key difference is that the Cerox format incorporates eight separate 400-meter runs between each exercise zone, while the Cerox Iron format consists solely of the eight fitness zones without the running segments.
Teams of two are allowed to divide the work in the zones as they choose. The event uses an estimated wave start schedule. Visit the organization's website for the most recent information.
