Castro Fitness — formerly Alex Fitness

Fitness Center, Trainers, Gym

second floor, 2275 Market St Ste d, San Francisco, CA 94114

About Castro Fitness — formerly Alex Fitness

Alex Fitness is a family-owned Fitness Center in the heart of the Castro, offering a welcoming, clean, and judgment-free space for its members. The gym features a fully equipped facility with premium strength and cardio equipment, showers, locker rooms, and towel service. Alex Fitness also provides personal training sessions, allowing members to easily find the perfect trainer for their needs. The gym has a capped membership, ensuring that members never have to stop their workout due to overcrowding or unavailable equipment. With a friendly staff, a well-stocked facility, and a true community vibe, Alex Fitness aims to provide its members with the best fitness experience in San Francisco.

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Castro Fitness — formerly Alex Fitness
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Reviews for Castro Fitness — formerly Alex Fitness

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  • Jul 2026

    I have been coming to this gym for almost 2 years now (long overdue review, I know). I love how inclusive it is - nobody hassles me, there are young and old, male and female, and lots of differing skill levels. It’s a refreshing change from some of the super specialized gyms, that can also often feel like a dating site. Thanks Castro Fitness. ❤

  • May 2026

    Alex Fitness is a gym that I routinely come back to when work or family visits bring me back to SF. They offer great day and week passes, so I never have to miss my workout routine when traveling.
    Their exercise equipment is great and covers all the necessary bases, plus they have dedicated stretching and kinesthetic areas.
    The staff are also super friendly.

  • Apr 2026

    I have been introduced to this gym since 2013 when I started training with Carlos. It has always been clean and staff has always been friendly. Does not get too busy as to where you can’t get a good work out in. There have been days when training and it is packed but Carlos always found a space to train comfortably. Since 2013 the gym has improved in so many ways. Towel service is the best as the cool fountain water to refill my bottle during the workouts. They open and close at a decent time. The only negative is that there is only ONE ALEX FiTNESS in town. Thanks for having a great atmosphere to work in and music is always good here :)

Hours

Monday: 6AM - 10PM
Tuesday: 6AM - 10PM
Wednesday: 6AM - 10PM
Thursday: 6AM - 10PM
Friday: 6AM - 10PM
Saturday: 8AM - 8PM
Sunday: 8AM - 8PM

Tips

1:1 sessions available accepts credit cards veteran-owned bike parking

Location

second floor, 2275 Market St Ste d, San Francisco

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