3 running events in Frederick, Colorado

From big races to Saturday morning group runs—find running events and connect with the local endurance sports community.

• CEROX IRON + IRON X [runsignup.com]
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  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

  Run Walk

  3771 Monarch Street, Frederick, Colorado, 80516, United States
  OpenStreetMap Google Maps
• CEROX + IRON [runsignup.com]
  • Subscribe to My Calendar (sign in required)

  • ---

  • Download single event

  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

  Run Walk

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