More Than a Gym
At RedZone Athletic, fitness is personal—even in a group setting. We built this gym in Windsor, Colorado to bring the energy of a team workout together with the focus of one-on-one training.
Every class challenges members to push harder, move smarter, and stay consistent. Whether you're new to fitness or looking to reach new goals, our coaches meet you where you are and help you get stronger every week.
Our Mission
Help every member improve physically and mentally while building a community that feels like family. We believe fitness should be fun, focused, and judgment-free.
Our Journey
From one location to a growing NoCo fitness community.
Windsor Location Opens
RedZone Athletic opens its doors in Windsor, Colorado.
Community Expands
Building a family of members committed to fitness and positive energy.
HYROX Training Facility
Became an official HYROX training facility for competitive fitness.
Berthoud Location Opens
Opened second location to serve more of Northern Colorado.
The RedZone Difference
Community-Focused
Beyond gym walls—community events, outdoor workouts, and youth programs that bring Windsor together.
Heart Rate Monitoring
Real-time tracking to maximize every minute and ensure proper form.
Structured Programming
Designed to maximize results and eliminate plateaus for all ages and fitness levels.
No-Ego Attitude
A judgment-free space with exceptional equipment and qualified coaches.
Coaches Who Care
Each coach brings unique experience in strength training, cardio, plyometrics, and functional movement—guiding members through workouts that are both challenging and achievable.
Greg Osborne
Owner & Coach
Co-owner of RedZone Athletic who leads classes and believes fitness should be fun, focused, and judgment-free. His goal is to help every member improve physically and mentally while building a community that feels like family.
Suzannah Mattson
Owner
Co-owner of RedZone Athletic who leads a team of passionate coaches dedicated to helping members achieve their fitness goals in a supportive environment.
Matt Wagner
Coach (Strong Man)
Leads youth classes on Monday/Wednesday at 4:45 PM and adult classes including Grit and RedLine. Known for his strength training expertise.
Candace Covington
Coach (Pro Athlete)
Pro Athlete Coach who leads youth classes on Tuesday/Thursday at 6:45 PM and adult RedLine classes. Brings professional athletic experience to training.
Trent Mack
Coach
Leads early morning and weekend classes including RedLine and youth programming. Part of the dedicated coaching team at RedZone.
A.J. Percival
Coach
Leads early morning Lower RedLine classes, helping members start their day with high-intensity training.
Two Locations
Serving Northern Colorado.
Windsor
Flagship Location
601C Gyrfalcon Ct, Windsor, CO 80550
Cold Plunge & Infrared Dry Sauna
Full Class Schedule
Youth Programs
Berthoud
Newest Location
Berthoud, Colorado
Vinyasa & Power Yoga
RedLine Classes
Growing Community
Ready to Start Your Journey?
Whether you have questions about our classes, want to schedule a tour, or are ready to join the RedZone family—we'd love to hear from you.