CEROX IRON + IRON X

Get ready for a functional fitness challenge built for all abilities.

Cerox is back, and this time, there’s no running. Just pure work.

You’ll take on 8 fitness zones designed to test your endurance, strength, and grit. Choose your level of challenge:

Cerox Iron:  The same zones as the classic Cerox event, but without the running.
Cerox Iron X: Twice the grind, none of the miles. Double the reps, double the work.

You can sign up as an individual or with a partner team. Teams can divide the zone work however they choose.

Estimated Wave Time:

11 AM: Iron X Individual

12 PM: Iron Individual

1 PM: Iron X Teams

2 PM: Iron Teams

Get your tickets now and be part of the action on November 15th!

Cerox Iron Workout:

Zone 1: 400M Row Erg

Zone 2: 30 Deadlifts - 155/105

Zone 3: 400M Ski Erg

Zone 4: 20 Sandbag Over 4' Bar - 100/70

Zone 5: 75M Walking Lunges - RAM 55/33

Zone 6: 200M Farmers Carry - 2x 60's/ 40's

Zone 7: 30 Cal. Echo Bike

Zone 8: 30 Burpees to Plate

Cerox Iron X Workout:

Zone 1: 800M Row Erg

Zone 2: 60 Deadlifts - 155/105

Zone 3: 800M Ski Erg

Zone 4: 40 Sandbag Over 4' Bar - 100/70

Zone 5: 150M Walking Lunges - RAM 55/33

Zone 6: 400M Farmers Carry - 2x 60's/ 40's

Zone 7: 60 Cal. Echo Bike

Zone 8: 60 Burpees to Plate

The CEROX IRON + IRON X brings an exciting race distance to Frederick, Colorado on November 15, 2025. Don't miss this beautiful event!