CEROX + IRON

More races nearby

• CEROX IRON + IRON X [runsignup.com]

  Sat, May 09, 2026 at 11:00 AM

  Description

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  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,...

  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

  0 m from Frederick
  3771 Monarch Street, Frederick, Colorado, 80516, United States
  OpenStreetMap Google Maps

  Run Walk

• Haul Ass Ultra Running Festival [letsfeelgreatsports.com] [Register at ultrasignup.com]

  Sat, Jun 06, 2026

  3.8 km from Frederick
  3470 Co Rd 7, Erie, Colorado, 80516, United States
  OpenStreetMap Google Maps

  5k 10k 50k Run Ultra

• CEROX + IRON [runsignup.com]

  Sat, Jul 25, 2026 at 11:00 AM

  Description

  ▼ Show more Show less

  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...

  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

  0 m from Frederick
  3771 Monarch Street, Frederick, Colorado, 80516, United States
  OpenStreetMap Google Maps

  Run Walk

• Erie Half & 5k [runsignup.com]

  Sun, Aug 16, 2026 at 7:00 AM

  Description

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  Join us for the Erie Half and 5k!

  The Hometown Race Series features half marathons and 5k distance events in outlying communities outside the Denver and Boulder metro areas.

  LOOK UP! At the Erie...

  Join us for the Erie Half and 5k!

  The Hometown Race Series features half marathons and 5k distance events in outlying communities outside the Denver and Boulder metro areas.

  LOOK UP! At the Erie event, we often see the early morning skies with dotted with delightfully colorful hot-air balloons.

  Whatever distance you're ready to tackle, we'll be there with you to celebrate at the finish line! This is one of the few 5k events where FINISHER MEDALS are awarded to each participant. Go home with proof of your pride and show off that bling!

  6.8 km from Frederick
  Erie, Colorado, 80516, United States
  OpenStreetMap Google Maps

  5k 13.1 Miles Run