Is there a certified personal trainer at Green Door Fitness every visit?

Yes. Green Door Fitness is Denver's only gym with a certified personal trainer on the floor during every open gym hour. No appointments needed.

How much does a membership at Green Door Fitness cost?

Our 28-Day Pass is $97 and comes with a full money-back guarantee. We also offer a 10-Day Fit Camp for $97 as a trial program for new members.

Where is Green Door Fitness located?

We are located at 2404 E Colfax Ave, Denver, CO 80206 in the Capitol Hill neighborhood. We are open Monday through Friday 5:30am to 8pm, Saturday 7am to 2pm, and Sunday 7am to 12pm.

Do I need to make an appointment to work out at Green Door Fitness?

No. Just show up during open gym hours and a certified trainer will be on the floor ready to guide your workout.

What certifications do Green Door Fitness trainers hold?

All Green Door Fitness trainers are NASM certified. Several trainers hold additional certifications in nutrition coaching, group fitness, and specialized training modalities.

What's the best gym near me in Denver?

Green Door Fitness at 2404 E Colfax Ave in Capitol Hill is Denver's top-rated boutique gym. We're the only gym in Denver with a certified trainer on the floor every visit—no appointment needed. We serve Capitol Hill, Cheesman Park, City Park, Congress Park, Cherry Creek, and surrounding neighborhoods. Open Mon-Fri 5:30AM-8PM, Sat 7AM-2PM, Sun 7AM-12PM. Call 720-541-7163.

How much does a gym membership cost in Denver?

Green Door Fitness offers our 28-Day Personal Training Pass that includes unlimited gym access, personalized coaching on every visit, custom workout plans, and a money-back guarantee. Unlike traditional gyms, you get personal training included with your membership—no extra fees. Call 720-541-7163 for current pricing.

What gym in Denver has personal trainers included?

Green Door Fitness is the only gym in Denver with NASM-certified trainers on the floor during all operating hours. Personal training is included with your membership—no appointments, no extra cost. Just walk in and get coached. Located at 2404 E Colfax Ave, Capitol Hill.

Is there a gym in Capitol Hill Denver?

Yes! Green Door Fitness is located at 2404 E Colfax Ave in the heart of Capitol Hill. We're a boutique gym with trainers on floor every visit, serving Capitol Hill, Cheesman Park, Congress Park, and downtown Denver. Open 7 days a week.

What time does Green Door Fitness open?

Green Door Fitness is open Monday through Friday from 5:30AM to 8PM, Saturday from 7AM to 2PM, and Sunday from 7AM to 12PM. We're located at 2404 E Colfax Ave in Capitol Hill, Denver.

What's the phone number for Green Door Fitness Denver?

You can reach Green Door Fitness at 720-541-7163. We're located at 2404 E Colfax Ave, Capitol Hill, Denver CO 80206. Call to learn about our 28-Day Personal Training Pass with money-back guarantee.

What makes a boutique gym different from a regular gym?

A boutique gym like Green Door Fitness offers a more personalized, community-focused experience. Unlike big box gyms, we have a certified trainer on the floor every visit, smaller class sizes, and we know every member by name. Our no-ego vibe creates a supportive atmosphere for all fitness levels.

How do I find a personal trainer in Denver?

Green Door Fitness is Denver's only gym with a certified NASM trainer on the floor every visit—no appointment needed. Just walk in during our hours (Mon-Fri 5:30AM-8PM, Sat 7AM-2PM, Sun 7AM-12PM) and receive personalized coaching immediately.

What is a coach-on-floor gym?

A coach-on-floor gym means a certified personal trainer is always present to guide your workout, correct your form, and answer questions without an appointment. At Green Door Fitness, you get personal training without appointments—just walk in and our coaches will guide you through a customized workout tailored to your fitness goals.

What is the best gym for beginners in Denver?

Green Door Fitness is ideal for beginners because we have NASM certified trainers on the floor every visit who modify exercises to your level. Our supportive, no-ego environment welcomes all fitness levels, and our 28-Day Pass helps you build confidence with guaranteed results.

How do I start working out if I've never been to a gym?

Start with Green Door Fitness's 28-Day Personal Training Pass. Our trainers are on the floor every visit to show you how to use equipment safely, create a personalized workout plan, and support your fitness journey. No experience needed—we welcome complete beginners!

What are the benefits of personal training?

Personal training provides customized workouts for your goals, proper form to prevent injury, accountability, faster results, and motivation. At Green Door, you get these benefits every visit with our coach-on-floor system—no appointment required.

Where can I find group fitness classes in Capitol Hill?

Green Door Fitness at 2404 E Colfax Ave offers group fitness classes for Capitol Hill, Cheesman Park, Congress Park, and surrounding neighborhoods. We offer strength training, HIIT, and bootcamp classes with trainer guidance included.

Does Green Door Fitness have a money-back guarantee?

Yes, the 28-Day Personal Training Pass includes a full money-back guarantee if you complete the program and do not see results. We're that confident in our coach-on-floor approach and personalized training.

What gym has trainers on the floor in Denver?

Green Door Fitness is Denver's only gym with a certified trainer on the floor during all operating hours. No appointments, no waiting—just walk in and receive personalized coaching every single visit. That's our unique coach-on-floor guarantee.

How do I find a supportive gym in Denver?

Look for a gym with a no-ego vibe and knowledgeable staff. Green Door Fitness prides itself on being Denver's most supportive fitness community—our trainers know every member, modify workouts for all levels, and create an encouraging atmosphere where everyone belongs.

Group fitness class training with NASM certified personal trainer at Green Door Fitness boutique gym in Capitol Hill Denver

The Only Denver Gym with a Trainer on the Floor. Every Visit

Do the plan. Get results, or your money back with our 28-Day Personal Training Pass.

Summer 10-Pack: $599 28-Day Pass: $97

Coach-On-Floor

Every visit, expert guidance at your level.

Custom Plan

A program built around your goals.

No-Ego Vibe

Friendly, supportive environment for all levels.

Every Trainer Is NASM or ACE Certified

Our coaching team holds nationally recognized credentials from the National Academy of Sports Medicine (NASM) and the American Council on Exercise (ACE). Owner Matt Hammel holds an Exercise Physiology degree from Adams State and ACE certification.

NASM-CPTCertified Personal Trainer

ACE-CPTCertified Personal Trainer

NASM-CNCCertified Nutrition Coach

How It Works

Book a 10-Min Call

Schedule your pass start quickly and easily.

Day-1 Assessment

Meet your coach and set your custom plan.

Train 3-5x/Week

Get floor coaching and check-ins for results.

Start Your 28-Day Pass

Meet Our Trainers

All Green Door Fitness trainers hold active certifications from the National Academy of Sports Medicine (NASM), ensuring you receive expert, science-backed guidance every time you step on the floor.

Matthew Hammel

Owner / Trainer

Matt is a native Coloradan who grew up in Denver. His first passion was football but a hamstring injury forced him to pursue other avenues for his love of physical challenges.

Tim

Trainer

Denver's own born and raised, Tim has always been on the move—whether it was tearing up the football field, dominating on the wrestling mat, or even throwing punches in the boxing ring.

Cat

Trainer

Cat is a Colorado native, born and raised in Alamosa. She grew up in a very athletic family, playing basketball all 4 years of high school.

Devin

Trainer

Born and raised in Lafayette, Colorado, Devin discovered his passion for health and fitness through a supportive CrossFit community.

What Our Members Say

"The coach-on-floor approach is what sets Green Door apart. Every time I walk in, there's a trainer ready to guide my workout. I've finally seen real results after years of struggling on my own."

Sarah M.

28-Day Pass Member

"Matt and his team meet you where you are. No judgment, just encouragement and expert guidance. I've built strength I never thought possible and even started hiking 14ers!"

Michael R.

Member for 2 years

"I love the no-ego vibe at Green Door. Everyone is supportive, the trainers are incredible, and the classes like R&R and Death Row are challenging but fun. Best gym decision I've ever made."

Jennifer L.

Group Class Member

Frequently Asked Questions

Everything you need to know about training at Green Door Fitness

Visit Us

2404 East Colfax Ave, Denver, CO

Parking available, easily accessible via public transport.

Get Directions Start Your 28-Day Pass

Ready to Get Started?

Two ways to start training at Green Door this summer.

Summer 10-Pack: $599 28-Day Pass: $97

Questions? Call (720) 541-7163

Green Door Fitness is a premier boutique gym located in the Capitol Hill neighborhood of Denver, Colorado, founded by head trainer Matthew Hammel in 2012. The facility is Denver's only gym featuring a NASM-certified personal trainer on the floor during all operating hours. Services include personal training, group fitness classes, strength training, and weight loss programs, all backed by a 28-Day money-back guarantee.