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Lost Boys Jiu-Jitsu & Muay Thai

5 ★★★★★ 17 Google reviews · BJJ gym in Arcata, California

BJJ gym Kids & teens No-gi Competition team

Plan your first class

  • Kids & youth classes kids and youth BJJ classes (ages 7–14) — built around discipline, focus, and confidence
  • No-gi no-gi grappling classes — training in a rashguard and shorts, with faster scrambles and a natural bridge to MMA
  • 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 lostboysbjj.com — book classes and see the live schedule
  • Phone (707) 388-3111

Hours

Monday 9 AM–12 PM, 5–9:30 PM
Tuesday 5–8:30 PM
Wednesday 9 AM–12 PM, 5–9:30 PM
Thursday 5–8:30 PM
Friday 4–8:30 PM
Saturday 10 AM–2 PM
Sunday Closed

Hours shift for holidays, seminars, and open-gym times — worth a quick check before a special trip.

The classes they run

BJJ classes on the schedule at Lost Boys Jiu-Jitsu & Muay Thai, confirmed in members' own reviews and the gym's own info — not guessed from the sign out front.

🧒 Kids BJJ 17 mentions

“From the moment I walked into the door to inquire about the kids class, I knew I was in the right place.”

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🏆 Competition Team 3 mentions

“During this time, he's not only emerged victorious from multiple tournaments, but he's also undergone a remarkable transformation.”

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🔓 Open Mat

“I was travelling thru and dropped in for an open mat training.”

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🛡️ Self-Defense

“If you want your kids to learn self control and self defense, this is the place to be.”

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Other martial arts here

BJJ gyms are usually multi-discipline. Here's what else members mention training under the same roof at Lost Boys Jiu-Jitsu & Muay Thai — mined from their reviews and the gym's own info.

🥊 Muay Thai 2 mentions

“If your considering jiujitsu, muay thai, or mma you will love coming here.”

Other gyms that also teach muay thai →

🏟️ MMA

“If your considering jiujitsu, muay thai, or mma you will love coming here.”

Other gyms that also teach mma →

Disciplines are mined from reviews and the gym's own info — they show what members have trained, not a formal class guarantee. If you specifically want MMA, muay thai, or wrestling alongside your BJJ, confirm the current schedule with the gym.

What members say

The things reviewers bring up again and again across 17 Google reviews — in their own words.

🤝 no-ego, friendly academy 6 mentions

“The coaches at Lost Boys have created a supportive and inspiring environment where my son can thrive.”

📘 strong technique & fundamentals 2 mentions

“They're constantly pushing each other to improve, learning new techniques every day.”

active competition team 3 mentions

“During this time, he's not only emerged victorious from multiple tournaments, but he's also undergone a remarkable transformation.”

From the reviews

From the moment I walked into the door to inquire about the kids class, I knew I was in the right place. The instructors were able to naturally bond with my son right away. They know how to get down on his level, be a positive influence, and make Jiu-jitsu fun.

★★★★★ — Robert, Apr 2019

I took a few Jiu Jitsu classes at Lost Boys! Its a humble dojo, kind of a hidden gym!. I picked up several new techniques.Although I didn't take the Muay Thai class. I like this place a lot! if your in the area.. check them out!

★★★★★ — Aye-1, Feb 2021

My son has dedicated the past two and a half years to training at Lost Boys. During this time, he's not only emerged victorious from multiple tournaments, but he's also undergone a remarkable transformation.

★★★★★ — Kerry, Nov 2024

I was travelling thru and dropped in for an open mat training. Very open and friendly folks there, good atmosphere, nice new dojo (particularly good mats). I had a few good rolls there and learned some new stuff -- special thanks to Dante for the tips.

★★★★★ — Andrin, Jul 2018

Excerpts from public Google reviews. Read all 17 reviews →

Your first BJJ class at Lost Boys Jiu-Jitsu & Muay Thai

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.

BJJ is a contact sport. Ease in, tap early and often, listen to your coaches, and if you have any injuries or health concerns, mention them before class and check with a doctor if you're unsure.

Where to find Lost Boys Jiu-Jitsu & Muay Thai

5000 Valley W Blvd #8, Arcata, CA95521

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Listing verified July 2026 from public business records and member reviews. Something out of date? Report a correction. Own this gym? Claim your listing — it's free.