Underground Fitness
“My husband and I have been working with Gil as our personal trainer for seven months, and it's been amazing.”
Best Personal Trainers in Castro Valley, CA
13 trainers listed · 5 in Castro Valley · 2 open 24/7 · all 13 open weekends · all 13 rated 4.5+
Data verified October 18, 2026
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Body Mechanix Fitness
“When we began to quarantine I figured I'd be without my trainer for a while, but Marlon was able to deliver the same quality workouts over zoom as I get in person.”
Danville Jiu Jitsu
“I also train there as an adult and love the instruction, culture and have made some amazing friends.”
Moxie Women's Fitness
“Lots of equipment to work with as well as different classes at all levels.”
Castro Valley Fitness
“I've been a member for more than 5 years and I continue here because of the personal connection with Tammy and Mitch.”
Beyond Health & Fitness Studio
“! I genuinely look forward to every training session, and feel strong and energized after each one (although I gotta say I also feel completely exhausted at the same time, does that make sense?)”
This page lists 13 personal trainers and training gyms recorded for Castro Valley, CA. What each one says about its approach, its hours and its booking comes from its own website; ratings and quotes come from public reviews.
Area overview: Castro Valley, CA
5 of the 13 trainers we list are based in Castro Valley; the other 8 serve Castro Valley from towns including Oakland (10 mi), San Ramon (8 mi) and Danville (9 mi). The trainers on this page are rated from 4.7 to 5.0 across 1,019 reviews; 8 have 50 or more reviews. The topics that come up most in reviews of the trainers on this page are "atmosphere", "community" and "motivating". 2 are open around the clock; all 13 are open on Saturdays and 6 on Sundays. Domain records put 8 websites of the trainers on this page at ten or more years old; the oldest dates from 2000. 1 offers a free trial or consultation and 2 list coupons or special offers. We have a website on file for all 13 of the trainers on this page; 9 publish a contact page; 10 list a public email and 4 take bookings online. We count these figures across the trainers on this page; distances are straight-line, and hours and prices change, so confirm the details with the trainer before you enroll.
Can I book a trainer listed for Castro Valley online?
4 of the 13 listings take online bookings. A first phone call is normal anyway, because a trainer wants to know what they are working with before putting you in a slot.
Konjo Training
“Highly recommended personal trainer for hitting any fitness goals you may have, especially if you're looking for fight training.”
Body By Pam
“I assumed at the start of Shelter-In-Place (because of the COVID-19 pandemic), that I would have to wait until they reopened--and who knows when that will be--but I gave virtual training sessions a chance, and they have been wonderful.”
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The Well Studio
“When I recently had to pause my membership for a few weeks due to an unexpected emergency, there was no pressure; no contract issues to deal with; and I received personalized check-in emails while I was out!”
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Ownit Rx
“I've not only improved my physical health but gained a newfound confidence in myself because I'm finally happy with my physique which no other gym was ever able to give me”
Steve Paul Athletics
“Under Steve's guidance, our son has seen a significant improvement in strength and looks forward to his weekly workout sessions.”
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Bliss Fitness and Health
“Everyone is really down to Earth and the teachers really have us get to know each other.”
TNT Strength
“If you live in the bay area and want to get and stay strong without getting hurt or wasting time, you need to go to TNT Strength Oakland.”
Why these companies made our list
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