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Onyx Grappling
4.9 ★★★★★ 102 Google reviews · BJJ gym in St Peters, Missouri
Affiliated academy — reviews and the gym's own info point to a recognized BJJ lineage or affiliation (think Gracie Barra, 10th Planet, Renzo Gracie, Alliance, Atos or Checkmat). If lineage matters to you, ask which affiliation the academy belongs to and under whom the head instructor earned their black belt.
Plan your first class
- Free trial or intro class most gyms welcome new members with a free trial or intro class — check their site or give them a call to book your first session
- Beginner-friendly all levels welcome, including total beginners — you don't need to be fit or have any experience to start
- Kids & youth classes kids and youth BJJ classes — built around discipline, focus, and confidence
- Women's classes dedicated women's BJJ classes — a welcoming space to train and start out in
- Open mat open-mat rolling sessions for members to practice live — always optional and at your own pace
- Competition team a competition team for members who want to test themselves at tournaments
- Today see hours ·
- Website & schedule onyxgrappling.com — book classes and see the live schedule
- Phone +1 636-339-4277
Hours
| Monday | 11 am–1 pm, 4:30–8 pm |
| Tuesday | 4:30–8 pm |
| Wednesday | 11 am–1 pm, 4:30–9 pm |
| Thursday | 4:30–8 pm |
| Friday | 11 am–1 pm, 4:30–8 pm |
| Saturday | 10 am–12 pm |
| Sunday | Closed |
The classes they run
“My oldest son who has taken BJJ to the competitive level in his first year has been dominating in competition, even against kids who have been training for years longer than him!”
“My daughter and I love the women's class on Thursday nights!”
“But, don't let the years of competitive medals and titles (including Worlds Masters Champion) scare you.”
“I had a great time dropping in at Gracie Barra St Peters during an open mat session.”
“Whether you are looking yourself for a good workout/self defense or somewhere to help your kids with bullies and/or confidence, GB St Peters is a great place to to do it!”
Other martial arts here
“He has really been enjoying kickboxing and wrestling class recently as well.”
“He has really been enjoying kickboxing and wrestling class recently as well.”
What members say
“Professor Dennis and Professor Rob were extremely welcoming and gave excellent feedback along the way.”
“Professor Dennis and Professor Rob were extremely welcoming and gave excellent feedback along the way.”
“Whether you are looking yourself for a good workout/self defense or somewhere to help your kids with bullies and/or confidence, GB St Peters is a great place to to do it!”
“My oldest son who has taken BJJ to the competitive level in his first year has been dominating in competition, even against kids who have been training for years longer than him!”
“Peter’s Gracie Barra Jiu Jitsu arms my children with a disciplined mind, physical strength, and effective defense to thrive in any situation presented to them in life.”
“The facility is clean, everyone is friendly the instruction is top notch and My daughters and I are bonding closer each class.”
From the reviews
We love Gracie Barra St. Peter’s! All 3 of my kiddos do BJJ here and we love it! We have been members for a little over a year and have loved our time here! The community is awesome and the training is top notch!
Update: Still going strong and loving his classes months later! My son has been in classes for a few weeks and is loving it. The teachers/trainers are great with the children and take time to make sure all of them get a great experience.
My kids have been in Jiu Jitsu here for about two years since we moved to the St. Louis/St. Charles, Missouri area. The classes are outstanding and the coaches/professors engage and challenge the kids (and adults) to improve incrementally with each class.
My children and I have been training here for about 9 months and it has been a great experience. The instructors are highly professional and genuinely care about each student. The atmosphere is welcoming, respectful, and disciplined.
New to BJJ? Start at Onyx Grappling
Onyx Grappling comes up as a beginner-friendly gym — noted on their own site. If you've never rolled or set foot on a mat, that's exactly who a good beginners program is for. A few things worth knowing before your first week. First, you don't need to be fit or flexible to start — you get in shape by training, not before it, and coaches scale the intensity to you. Second, you won't be thrown into hard rolling — reputable gyms build fundamentals (positions, escapes, and basic submissions) for weeks, live rolling eases in gradually, and tapping early keeps every roll safe. Third, all levels really are welcome — ask about a dedicated beginners or fundamentals class time so your first session is alongside others who are also starting out, and leave your ego at the door. Most gyms are happy to let you watch or try a class first, so reach out before you commit.
Your first BJJ class at Onyx Grappling
Nervous about walking into a BJJ gym for the first time? Almost everyone is, and good coaches expect beginners to come through the door. Here's what to know. What to expect: a typical first class is a warm-up, then drilling basic positions and escapes with a partner — not hard sparring. Rest whenever you need to; no one will bat an eye. What to wear: athletic wear you can move in (or a gi if you have one); you'll train barefoot on the mats. What to bring: water and a mouthguard if you have one — many gyms lend a loaner gi for a first class, so it's worth asking when you call. As you keep training you'll add your own gi (or a rashguard and shorts for no-gi) and a mouthguard. Live rolling eases in gradually, once your fundamentals are solid. Arrive 10–15 minutes early to sign a waiver and meet the coach. It gets easier fast — most people feel far more at home by their third class.
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