The center is an official CrossFit® affiliate. Last checked: 28/09/2025

CrossFit is a registered trademark owned by CrossFit, LLC, which is not affiliated with FitFit United States.

Information about CrossFit® Surge

Irma Dr 10621
80233, Thornton
+1 720-289-5789

Opening hours

  • Monday: 5:00 AM – 7:00 PM
  • Tuesday: 5:00 AM – 7:00 PM
  • Wednesday: 5:00 AM – 7:00 PM
  • Thursday: 5:00 AM – 7:00 PM
  • Friday: 5:00 AM – 7:00 PM
  • Saturday: 8:00 – 11:30 AM
  • Sunday: Closed

Services, Machines and Guided Classes

CrossFit®

CrossFit® Surge: Opinions

5/5 (5 Opinions)
Estella Hageman 3 years ago

Fantastic experience: Surge is amazing! I have never felt stronger or more capable. My mindset has become much more positive and I am consistently pushed to do my best! I would recommend them to everyone!

Brett McGraw 3 years ago

Fantastic experience: I started going to Surge about 2 years ago to boost my strength for my high school baseball season. At first I was scared to workout with a group of unknown people due to my inexperience, but Brandon, Courtney, and the entire Surge community immediately made me feel at home. Brandon and Courtney make a point to make sure each new member is comfortable and they work individually with each person to help build an ideal plan specific to them. I had shoulder issues stemming from playing baseball and Brandon made sure to substitute safer lifts into my programming to continue growth whilst also staying away from injuries. They have gone above and beyond in many ways whether it be helping me construct a meal plan, or sending me a workout plan to do from home during severe weather. I have loved every moment at Surge and would recommend it to any and everyone.

Sarah Garcia 3 years ago

Fantastic experience: If your looking for a new home gym , check out surge . I’ve had back and knees surgeries within the past 3 year so I was nervous to start a workout regimen. Although the classes are group setting they’ve help modify the workouts to my fitness level . With the help from Brandon and Courtney, I have less knee and back pain , and feel stronger then ever.

Pamela 3 years ago

Fantastic experience: After coming back from visiting four years ago this place has definitely reminded me why I wanted to come back and train with the amazing coaches and members again. I have visited many gyms over many countries and Surge is by far one of my all time favourites to come back to when I’m visiting family in Denver. The coaching and programming is just another level. I am always excited and challenged by the programming and the coaches make the whole experience enjoyable. Courtney and Brandon’s enthusiasm, friendliness and attention to detail makes them stand out from other coaches. They will break down movements tailored to the individuals needs or even challenge veteran members. Not only do I love their encouragement but the environment they have created in the gym with their members who I now call my friends too even after a short time. Always love coming here and I look forward to my next visit from Australia to Denver.

Vicky Cortez 3 years ago

Fantastic experience: Love this place!! Coaches are friendly, understanding and super helpful. Coach Chip is my favorite????

Leave your opinion about CrossFit® Surge:

1 = Poor 5 = Excellent

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