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    Mosaic Boulders

    4.9 (14 reviews)
    Open 10:00 am - 11:00 pm
    Updated 1 month ago

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    1 year ago

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    2 years ago

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    Michael H.

    Really glad you had a good time!

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    2 years ago

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    2 years ago

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    Michael H.

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    3 years ago

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    2 years ago

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    3 years ago

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    2 years ago

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    4 years ago

    I've been waiting for this spot to open and now they finally are! So nice to have a climbing gym so close to campus.

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    2 years ago

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    Michael H.

    Thanks so much!

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    3 years ago

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    Michael H.

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    Ask the Community - Mosaic Boulders

    I accident ly purchased 2 memeberships. Who can I contact to get one of them canceled?

    Yep, just email mike@mosiacboulders.com and provide your name to get that fixed! Best,… Read more

    Don’t See Your Question? Ask Away!

    Review Highlights - Mosaic Boulders

    The place is excellent, and the climb is suitable for me!

    Mentioned in 2 reviews

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    City Sports Club - Yoga class

    City Sports Club

    (914 reviews)

    This gym is a perfect nexus for me. It's convenient to get to, it's remarkably inexpensive…read more(relative to similar gyms), and staff are friendly. The facilities are always clean and there are plenty of machines and weights for all (leg workout devices are a little sparse). Maybe not state of the art and new, but it's excellent value. As a member, you can also visit any City Sports Club in the area, and there are many!

    This is a really nice physical space, I love the big windows and natural light…read more.. But omg I am too old for the misleading and covert sales attempts First of all, if having you hold a little machine with metal handles was a legit way to measure your physical fitness or cardio strength or lean muscle vs fat, I think on many decades of doctor visits I would have encountered it! This felt like 100 percent an attempt to leverage people's trust in technology and fear of the wellness industries standards too make me buy more services from this gym. Did I mention I'm too old to have a young man and his machine tell me about my body and health goals? They told me when I joined i would get a free personal training session that would tell me how to use machines ( i expressed repeatedly that i don't need help with goal setting, good on that, thanks!) Instead the supposed personal training session was an elaborate sales pitch. Did I mention I'm too old? The trainer had me do some exercises and I guess evaluated something but to get any details on how to use the machines, which I stated many many times was my only reason for the session , I was invited to give up more of my money and time. Luckily, I'm old, so all I wasted was about 3o minutes instead of also spending extra money or having random people with pseudo scientific machines and full in the blank worksheets make me doubt myself and my body. I'll keep coming bc working out feels good and makes me feel healthy but I'm aware I'm walking into an attempted scam every time I enter.

    Bay Strength - Section of gym

    Bay Strength

    (75 reviews)

    West Berkeley

    Bay Strength is not a gym. It is not a bunch of trainers. It is not a set of equipment. Bay…read moreStrength is a source of inspiration and perspiration. It is a reason for people to bond while they bend. It is a place where people come to lift their spirits as much as lifting weights. I highly recommend Bay Strength to anyone looking for a way to get started on strength training without being intimidated by it! The trainers are great at providing the right mix of support, guidance and independence to let each person navigate their own journey. They go above and beyond to provide an open, accepting, and fun environment which makes the whole experience so much better! I've only been training here for a few months and I can already feel myself getting stronger every week. Big shoutout to Kelly and Katherine for being amazing trainers and for helping me get started on my strength training journey!

    I love this place so much! As someone who has always been intimidated by weight rooms at most gyms,…read moreI immediately felt at ease and welcome at Bay Strength. The coaches teach you and correct your form in a positive way that is so encouraging, you never feel self conscious. They'll help you with alternative exercises or modifications if you ever need it. It's also so nice to not have to plan out your workouts, since the coaches lay everything out for you. They make it easy so that you can just go in and have fun while working at your own pace. The absolute best part of this gym is the people. I've made so many friends and we're always laughing and chatting and being silly. We cheer each other on, celebrate PRs, and crack jokes between sets. It's a true community, and I always feel so uplifted every time I'm here. Joining Bay Strength was the best decision I've made in a really long time, and I'm so grateful to be a part of this beautiful place.

    Phoenix Gym - Girls garage boxing!

    Phoenix Gym

    (40 reviews)

    West Berkeley

    Everything I said in my previous review still stands, I just want to highlight how awesome the…read moretrainers have been during the last year plus as we've all had to negotiate the COVID pandemic. They've adapted to teaching a mix of in-person and online classes and they've done an excellent job of making things challenging while keeping workouts accessible and adaptable as needed for everyone's personal situation. All of the trainers here are excellent, but most of the classes I take are with Deanna. Training with her is an incredibly positive experience--she is completely committed to helping her clients succeed, and not just in the gym. And on those days when my tank is empty or I'm not with it for whatever reason she's completely understanding and is able to adjust things to meet me where I'm at so I still get a good workout in. A lot of it may be behind the scenes, but she works just as hard as her clients at helping them achieves their goals. Phoenix Gym is an incredibly positive, supportive, and judgement-free zone, and being a member here has been a life-changing experience.

    Kelly is bad ass. She's tough and gorgeous at the same time! And she's super awesome to be around!…read more So the building is Krav Maga but you enter and go to the right of the building. Bootcamp has it's own deal. I came here for a free trial bootcamp class (and I'm hooked and coming back on Friday). Luckily it was 6 ladies and myself. I really liked that it was small and everyone was friendly. It started with some jumprope, followed by push ups (and repeat 5 times). Then we got our hands wrapped and put on the boxing gloves! We hit punching bags. Pretty fun to feel like Muhammed Ali. :) my knuckles are red. Boxing is only on Wednesdays. Then we did squats in between the different types of boxing moves. Then we got out some yoga mats and did different types of crunches. Sadly I forgot where my abs once were :( but I'm hoping to find them soon. Anyway, tons of fun!

    Mosaic Boulders - gyms - Updated May 2026

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