CEROX IRON + IRON X
- Date
- August 22, 2026
- Distance
- Cerox Iron Individual · Cerox Iron Teams of 2 · Cerox Iron X Individual & more
From the Organizer
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
Distances & Pricing
Race Location
About This Sport
From Endurance Grid's Founder
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Frequently Asked Questions (FAQs)
- What is the CEROX IRON + IRON X?
- CEROX IRON + IRON X is a running event held in Frederick, CO. Learn more about the different endurance sports here.
- When and where is the CEROX IRON + IRON X?
- Saturday, August 22, 2026 in Frederick, CO at 3771 Monarch Street, Frederick, CO. Check the official event page for exact start times and wave schedules.
- How do I register for the CEROX IRON + IRON X?
- Registration is handled through their official registration page. Confirm pricing, distances available, and sign up there.
CEROX IRON + IRON X
Aug 22, 2026