CEROX + IRON
- Date
- July 25, 2026
- Distance
- Cerox Individual · Cerox Teams of 2 · Cerox Iron Individual & more
From the Organizer
Get ready for a functional fitness challenge built for all abilities.
Cerox is back! This time you can choose between Cerox or Cerox Iron.
You’ll take on 8 fitness zones designed to test your endurance, strength, and grit. Choose your level of challenge:
Cerox: The event will feature 8 fitness zones plus running.
Cerox Iron: The same zones as the classic Cerox event, but without the running.
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: Cerox Individual
12 PM: Iron Individual
1 PM: Cerox Teams
2 PM: Iron Teams
Get your tickets now and be part of the action on February 28th!
Cerox Workout:
400M Run
Zone 1: 400M Row Erg
400M Run
Zone 2: 30 Deadlifts - 155/105
400M Run
Zone 3: 400M Ski Erg
400M Run
Zone 4: 20 Sandbag Over 4' Bar - 100/70
400M Run
Zone 5: 75M Walking Lunges - RAM 55/33
400M Run
Zone 6: 200M Farmers Carry - 2x 60's/ 40's
400M Run
Zone 7: 30 Cal. Echo Bike
400M Run
Zone 8: 30 Burpees to Plate
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
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.
Coming Up
More running races in CO
Girls on the Run Rockies Colfax SoleMates 2026
Marathon · Half Marathon
Race in the Clouds - Alma Dirt Festival 2026
Hahns Peak Vertical Trail Race
Erie Half & 5k
5K
Frequently Asked Questions (FAQs)
- What is the CEROX + IRON?
- CEROX + IRON is a running event held in Frederick, CO. Learn more about the different endurance sports here.
- When and where is the CEROX + IRON?
- Saturday, July 25, 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?
- Registration is handled through their official registration page. Confirm pricing, distances available, and sign up there.
CEROX + IRON
Jul 25, 2026