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Newcastle Ringside Gym

4.9 ★★★★★ 14 Google reviews · Kickboxing gym in Newcastle, California

Kids & teens Cardio kickboxing Competition team

Plan your first class

  • Cardio kickboxing classes high-energy cardio kickboxing on the bags and pads — a fun, sweaty workout built for fitness and weight loss, at your own pace
  • Kids & teen classes kids and teen kickboxing classes — built around confidence, focus, and fun
  • Competition team a competition team for members who want to test themselves in the ring — amateur kickboxing, muay thai, or K-1
  • Today see hours ·
  • Website & schedule ringsidegym.net — book classes and see the live schedule
  • Phone (916) 663-1022

Hours

Monday 5–8:30 PM
Tuesday 4:30–7:30 PM
Wednesday 5–8:30 PM
Thursday 4:30–7:30 PM
Friday 5–7 PM
Saturday Closed
Sunday Closed

Hours shift for holidays and class-schedule changes — worth a quick check before a special trip.

The classes they run

Kickboxing classes on the schedule at Newcastle Ringside Gym, confirmed in members' own reviews and the gym's own info — not guessed from the sign out front.

🔥 Cardio Kickboxing 2 mentions

“Excellent coaching, great workout and a friendly gym.”

All gyms that run cardio kickboxing →

🧒 Kids Kickboxing 2 mentions

“I've known Coach Gregg since he was a skinny, but inshape kid getting ready to fight Olympic Champion Mike Simms in the pros.”

All gyms that run kids kickboxing →

🤜 Sparring

“Looking to get in shape, spar, or compete.”

All gyms that run sparring →

🏆 Competition Team 4 mentions

“Whether you are just looking for a workout or you want to eventually compete as an amateur boxer, I recommend giving NRG a shot.”

All gyms that run competition team →

🥊 Boxing 6 mentions

“I've trained at many boxing gyms in SoCal now and I haven't seen the level of coaching provided to beginners in classes like Newcastle Ringside does.”

All gyms that run boxing →

Other martial arts here

Kickboxing gyms are usually multi-discipline. Here's what else members mention training under the same roof at Newcastle Ringside Gym — mined from their reviews and the gym's own info.

🥊 Boxing 6 mentions

“I've trained at many boxing gyms in SoCal now and I haven't seen the level of coaching provided to beginners in classes like Newcastle Ringside does.”

Other gyms that also teach boxing →

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 muay thai, boxing, or MMA alongside your kickboxing, confirm the current schedule with the gym.

What members say

The things reviewers bring up again and again across 14 Google reviews — in their own words.

🧑‍🏫 expert, motivating coaching 3 mentions

“Excellent coaching, great workout and a friendly gym.”

🎉 fun, high-energy classes 2 mentions

“Excellent coaching, great workout and a friendly gym.”

💦 killer cardio workout 3 mentions

“Classic boxing techniques and intense cardio training.”

🏆 active competition / fight team 4 mentions

“Whether you are just looking for a workout or you want to eventually compete as an amateur boxer, I recommend giving NRG a shot.”

🤝 friendly, family gym 4 mentions

“The coaches are knowledgeable and everyone at the gym have been nice and friendly which I appreciate so much.”

From the reviews

Amazing. Classic boxing techniques and intense cardio training. Great for young kids looking for a fun hobby and great for older participants looking to get in and stay in shape. Experienced, patient instructor and very friendly members.

★★★★★ — Average, Feb 2017

Great place that's kinda hidden gem in Newcastle. Excellent workout and good training if you like to box. Coaches there are good too. Greg the owner is good at what he does, as well as Mike and Julie!

★★★★★ — Paul, Sep 2023

Excellent coaching, great workout and a friendly gym. Looking to get in shape, spar, or compete. This is the place to accomplish your goals.

★★★★★ — Tim, Aug 2019

If you are serious about boxing, this is the place for you. No nonsense, no fancy stuff, just a great education. I recently moved on from this gym due to personal reasons, and will greatly miss the Newcastle Ringside family, but I can confidently say that out of all the combat sports I've done (TKD, Muay Thai, Judo),…

★★★★★ — Hasan, Feb 2025

Excerpts from public Google reviews. Read all 14 reviews →

Your first kickboxing class at Newcastle Ringside Gym

Nervous about walking into a kickboxing 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 the basics — stance, footwork, and punches and kicks on pads or a heavy bag — not hard sparring. Go at your own pace and rest whenever you need to; no one will bat an eye. What to wear: comfortable athletic clothes you can move and sweat in, and supportive trainers. What to bring: water, and hand wraps and gloves if you have them — many gyms lend loaner gloves for a first class, so it's worth asking when you call. As you keep training you'll add your own gloves and wraps (and shin guards once you start sparring). Sparring is optional and eases in gradually, once your basics 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.

Kickboxing is a contact sport. Warm up, pace yourself, 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 Newcastle Ringside Gym

10 Cypress St, Newcastle, CA95658

Get directions Facebook

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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.