Open now · Longmont, Colorado

Real Jiu‑Jitsu.Right in Longmont.

The first G13 academy in Colorado is open on the I-25 frontage road. There are two ways to start: take a free intro class and see if it is for you, or become one of the 50 founding members and lock a rate that never goes up. Adults, teens and kids from age four.

Unit C5, 13790 E. I-25 Frontage Rd, Longmont, CO
Lyons 66 Commercial Center · Serving Longmont, Mead, Firestone, Frederick, Erie, Dacono and Berthoud
Questions? Call us(303) 586-0163
Free intro class, Saturdays 10 AMFuji Superblocks under the matsClasses six days a week
Start Here

Two Ways In. Pick Yours.

One costs nothing and answers the question. The other costs less every month, for as long as you train.

Not sure yet

Take a free class

An hour on the mat before you decide anything. No card, no contract, and nobody follows you to the parking lot. Come train, or sit and watch a full class first.

  • Free, one hour
  • No experience needed
  • T-shirt and shorts, we have the rest
  • Adults, teens and kids from age 4
Pick my class time

Saturdays at 10:00 AM, and other times during the week.

Already decided

Become a founding member

The first 50 members set the rate they keep for as long as they train here. When we open and pricing goes up, yours does not move.

  • Rate locked for life
  • $100 registration covers your first uniform and rashguard
  • Capped at 50 memberships, first come first served
  • Adult, kids and family plans
See founder plans

Public pricing is higher than the founder rate.

Most people start with the free class. Founding membership is there for the ones who already know.

The G13 Standard

A Global Jiu-Jitsu Powerhouse. Now in Colorado.

G13 isn’t a startup gym. It’s one of the most respected names in Brazilian Jiu-Jitsu on earth: a proven methodology, a real belt system, and a culture forged across two decades. For the first time, that standard is on a mat in Colorado. As a founder, you’re not joining an experiment. You’re joining a legacy in its first year.

10,000+
Students worldwide
100+
Units across the globe
5
Countries
2013
Founded · 10+ years strong
Master Roberto Godoi, founder of G13, in a white gi with a black belt
The Lineage

Built by Master Roberto Godoi

It started in 1992 in a small room behind a house in São Paulo. From those roots, Master Roberto Godoi, a 6th-degree black belt with over 30 years on the mats, built G13 into a worldwide institution founded in 2013.

Every G13 academy teaches the same proven system: structured curriculum, a clear belt pathway, and a culture of discipline and accountability. Colorado is no different.

  • Proven methodology
  • Clear belt pathway
  • Accountability culture
First G13 in Colorado

Your Chance to Build It From Zero.

Founders shape the culture of a brand-new academy: the schedule, the community, the energy on the mat. You get the global G13 system with the intimacy of a home gym you helped create. Once the first 50 are in, this moment is gone.

Become a Founder Member

The network behind the name

This is what a G13 mat looks like.

The academy in Longmont is new. The system is not. These are G13 Cary and G13 Holly Springs in North Carolina, where the curriculum, the belt pathway and the standard for the room come from.

The full team of G13 Cary, North Carolina, lined up on the mat in white and blue gis
World headquartersG13 Cary, NC
The mat room at G13 Holly Springs seen from behind a seated class of dozens of students
The mat roomG13 Holly Springs, NC
A kids class seated in rows in the bright mat room at G13 Cary
Kids programG13 Cary, NC
Two adults rolling on the mat at G13 Cary, with the bright windows behind them
Adult classG13 Cary, NC

Photos from G13 Cary and G13 Holly Springs, North Carolina. Same curriculum, same belt pathway, same standard. Longmont opened the week of September 21 and photos of our own mat replace these as soon as we have them shot.

Who You Will Meet

Real People on the Mat, From Day One

A room is only as good as the people standing in it. Here is who is standing in this one.

Featured athlete

Carlos Eduardo “Kadu”

Featured Black Belt Athlete

Kadu is our featured black belt athlete, and he is G13. He did not come to us from outside the family, he came up inside it, under the same system and the same standard this room is built on. Over forty titles, a Pan-American championship won at fourteen, and back to back NAGA Philadelphia titles. Having that level of jiu-jitsu in the room raises the standard for everyone who trains here, from the very first class on.

  • 40+ Titles
  • IBJJF Pan-Am Champion
  • 2x NAGA Philadelphia
  • 2025 NAGA NJ Absolute

Mike Barthlow

Co-Owner · Brown Belt

Mike came to jiu-jitsu from Division One college athletics and a career as a Marine officer. He is a brown belt, and he won the Masters 5 Open Class world title as a blue belt. He and Lori built a school around its community once before, and they are doing it again here for Longmont and the towns around it.

  • Brown Belt
  • Masters 5 Open Class Champion
  • Division I Athlete
  • Former Marine Officer

Lori Barthlow

Co-Owner · Mental Performance Coach

Lori runs G13 Colorado alongside Mike. She is a mental performance coach and a former collegiate All-American gymnast, so she knows the sport side from the inside. Mind Over Athlete is her own practice, and it is where the harder half of jiu-jitsu gets dealt with: the nerves, the bad weeks, the voice that says you do not belong here yet.

  • Collegiate All-American Gymnast
  • Mental Performance Coach
  • Co-Owner
  • Mind Over Athlete
Programs & Classes

One Founder Rate. Every Program.

From your first day on the mat to competition prep, your founder membership covers it all, at no extra cost, ever. Here’s what you’ll train.

Day One

Adult Fundamentals

Brand new to BJJ? Start here. Build a strong base with the same structured G13 curriculum used worldwide.

Day One

Adult Advanced

Sharpen your ground game. Refine technique and mindset for peak performance on the mat.

Day One

No-Gi

Jiu-Jitsu without the uniform, adapting techniques for real-life movement and competition. Its own class on Wednesday evenings, taught at a fundamentals pace, so you do not need years on the mat to come.

Day One

Competition Team

For those chasing the podium. Tournament-focused training built around technique and mental strength.

Day One

Kids BJJ (4–13)

Little Kids (4–7) & Youth (8–13). Discipline, confidence and respect through a structured belt path.

Class photos from G13 Cary and G13 Holly Springs, North Carolina. Ours replace them as soon as we have them shot.

Teens 14–18 train alongside adults.  |  Your founder rate covers every current and future program, with no increase, ever.

Become a Founder Member
Weekly Schedule

Find Your Mat Time

Our full weekly class schedule at G13 BJJ Colorado in Longmont. Booking is open.

Your first class is free. Pick any class on the schedule
TimeMondayTuesdayWednesdayThursdayFridaySaturday
10:00 AM
·
·
·
·
·
Fundamentals
11:00 AM
·
·
·
·
·
Review Classall levels
12:00 PM
All Levels
All Levels
All Levels
All Levels
All Levels
Open Matall levels
4:30 PM
Kidsages 4–7
Kidsages 4–7
Kidsages 4–7
Kidsages 4–7
·
·
5:15 PM
Youthages 8–13
Youthages 8–13
Youthages 8–13
Youthages 8–13
·
·
6:00 PM
Fundamentals
All Levels
Fundamentals
All Levels
·
·
7:00 PM
Advanced
Open Matall levels
No-Gifundamentals
Open Matall levels
·
·
Fundamentals / All LevelsAdvancedNo-GiKids & YouthOpen Mat
Monday
12:00 PMAll Levels
4:30 PMKids ages 4–7
5:15 PMYouth ages 8–13
6:00 PMFundamentals
7:00 PMAdvanced
Tuesday
12:00 PMAll Levels
4:30 PMKids ages 4–7
5:15 PMYouth ages 8–13
6:00 PMAll Levels
7:00 PMOpen Mat all levels
Wednesday
12:00 PMAll Levels
4:30 PMKids ages 4–7
5:15 PMYouth ages 8–13
6:00 PMFundamentals
7:00 PMNo-Gi fundamentals
Thursday
12:00 PMAll Levels
4:30 PMKids ages 4–7
5:15 PMYouth ages 8–13
6:00 PMAll Levels
7:00 PMOpen Mat all levels
Friday
12:00 PMAll Levels
EveningsClosed
Saturday
10:00 AMFundamentals
11:00 AMReview Class all levels
12:00 PMOpen Mat all levels

Friday evenings are intentionally closed.
Teens 14–17 train in adult classes on approval. The schedule keeps adjusting as the room grows.

Beyond the Mat

Train the Mind, Not Just the Body

Jiu-jitsu tests you mentally long before it tests you physically. The nerves before a roll. The frustration of a bad week. The voice that says you don’t belong on the mat yet.

That’s why G13 Colorado members have access to Mind Over Athlete: mental performance coaching with Lori Barthlow, right here in our community.

  • Confidence for beginners stepping on the mat for the first time
  • Focus and composure for competitors under pressure
  • Mindset and resilience for kids and teens
Mind Over Athlete is an independent service, arranged directly with Lori. It is not part of your G13 membership. Sessions are individual and by appointment.
Explore Warrior Mindset

The Toughest Opponent Is Between Your Ears.

Mental performance coaching with Lori Barthlow, former collegiate All-American gymnast
Warrior Mindset Coaching for BJJ™

Founder Pricing

Choose Your Founder Plan

These are founder rates, locked for life, and only available to the first 50 founding members. Enroll now to secure yours while there are spots left.

A one-time registration includes your first G13 uniform & rashguard: $100 for Adult and Kids, $200 for Family, which covers two. Adult & Kids enroll online; Family is set up personally by our team.

Most PopularFounder Rate

Adult

All adult programs · unlimited

$159/month
  • Unlimited BJJ, No-Gi, Fundamentals & Advanced
  • Competition team access
  • Rate locked for life

$100 registration (includes uniform & rashguard)

Founder Rate

Kids

Ages 4–13 · unlimited

$125/month

Regular price after founders: $149 · you save $24 every month, for life

  • Little Kids (4–7) & Youth (8–13)
  • Structured curriculum & belt path
  • Priority enrollment for founders

$100 registration (includes uniform & rashguard)

Founder Rate

Family

All programs · immediate family

$249/month
$249/mo for the first 2 members, then +$99/mo per additional member. All programs, all ages.
  • Access to every program, all ages
  • Train together as a family
  • Best value per member

$200 registration (covers two uniforms & rashguards)

Teens 14–18 train in adult classes at the adult founder rate.  |  Questions? mike@g13bjjco.com

Not ready to pick a plan? Come take a free class first. Nothing here expires because you took a week to think.

Questions, Answered

Before You Start

The first questions people ask, whether they are coming to try a class or signing on as a founder.

Yes. One full class, no card and no contract. You reserve a time, show up in a t-shirt and shorts, train or just watch a full class, and decide afterwards. Pick a class time here.

No. Founding membership is for people who already know they want in and want the rate locked now. Everyone else is welcome to start with the free class and take their time. Most people do exactly that.

Adult and Kids memberships enroll online in a couple of minutes: pick your plan and secure your founder rate with a $100 registration fee. For Family plans the registration is $200, because it covers two uniforms; share your details and our team sets everything up with you personally. Either way, your founder rate is locked for life.

The one-time $100 registration covers your first official G13 uniform and rashguard. You’ll pick them up at your first class, so you’re fully outfitted and ready to train from day one. On the Family plan the registration is $200 and covers two uniforms.

Yes. We opened the week of September 21 and classes run six days a week at Longmont, CO (Lyons 66 Commercial Center, Unit C5, 13790 E. I-25 Frontage Rd), with an all levels class every weekday at noon.

Yes. As long as your membership stays active and in good standing, your founder rate never increases, even as public pricing rises and new programs are added.

Right now. Pick any class on the schedule and book it from this page. Your first class is free, with no card and no contract, whether or not you ever become a founder.

The Family founder plan is $249/month for the first two members, plus $99/month for each additional member. It covers every program for your immediate family, all ages.

Kids 4–13 (Little Kids 4–7, Youth 8–13), Teens 14–18 train in adult classes, and Adults of all ages and levels, from total beginner to advanced.

Still have a question? Email mike@g13bjjco.com

Open now in Longmont

The Mat Is Waiting.Pick Your Way In.

Come try a class before you decide anything, or lock a founding rate that never goes up. Both start on the same mat, in Longmont.

Free intro class, Saturdays 10 AMFounder rate locked for lifeLongmont, on the I-25 frontage road