Castro Gym With Sauna: $35 Day Pass at Fitness SF

Fitness SF Castro, at 2301 Market Street, is the easiest gym with a sauna in the Castro to walk into without a membership. A one-day pass costs $35, or $30 if a member brings you, and both the men's and women's locker rooms have a dry sauna. The club opens at 5am on weekdays and runs until midnight Monday through Thursday, which makes it one of the latest-closing sauna gyms in San Francisco.

The building has a backstory that regulars still bring up. For years this was a Gold's Gym franchise owned by a local family who ran clubs in SoMa, the Castro, Marin and Oakland. Hoodline reported in September 2012 that the family had vowed back in 2010 to cut ties with Gold's Gym International over corporate donations to anti-LGBT causes, and that the clubs would trade as Fitness SF from Saturday, September 15, 2012.

Fitness SF's own story credits two brothers, Zsolt and Sebastyen Jackovics, and describes the move as breaking away from a national franchise to become an independent Bay Area brand. In the Castro that decision mattered. The owner told Hoodline at the time that the gym had long been a pillar of the gay community, and the club still describes itself as a truly inclusive place with vibrant personalities on the floor.

The official amenities list names Men's and Women's Dry Saunas inside the locker rooms, alongside complimentary towel service, showers and E.O. body products. There is no steam room or pool listed for this club, so think of the sauna as a dry, quiet finish to a lifting session rather than a full spa circuit. Bring flip-flops and a second towel to sit on, since the benches get busy after 6pm.

Outside the locker rooms, the recovery corner adds a hydro-massage bed, a Hyperice station with massage tools and Human Touch massage chairs. A practical order after leg day is ten minutes on the hydro-massage bed while your heart rate settles, then the sauna, then a cold shower. That sequence keeps you out of the locker room line at the busiest change-over time, when the evening classes let out.

This is a serious lifting gym first. The club lists Olympic lifting platforms and power racks, plate-loaded equipment, selectorized machines and a functional training turf zone. The cardio deck looks out over Upper Market Street, and the official description calls out the views from that deck as a reason people choose this location over the other city clubs.

Expect the floor to be friendly but full on weekday evenings. Platform users tend to train in pairs, and the racks rotate faster if you ask to work in between sets rather than waiting for someone to finish. If you only need dumbbells and a bench, the early 5am to 7am window is the calmest time to train, and the sauna is usually empty enough to stretch out on the top bench.

The help center spells out walk-in pricing. A 1-Day Pass is $35, or $30 when you come with a member, and a 7-Day Pass costs $129. Both are San Francisco All Gym Access passes, so the same pass also works at the Embarcadero, Fillmore, Mid Market, SoMa and Transbay clubs, plus Marin and Oakland. That makes the 7-day option good value for a visitor who wants to try several neighborhoods in one week.

For full membership, Fitness SF says there are no enrollment, sign-up or annual fees, and the upfront cost is a full first month plus a full final month. The monthly rate is shown only inside the online join flow. If you are deciding between this club and Fillmore, take the free tour the gym offers at both and compare the locker rooms, since Castro's sauna is the main draw here.

One honest caution: if a sauna is the only thing you want, a single dry room inside a busy weightlifting gym will feel cramped at peak hours. Skip the 5:30pm to 7:30pm rush and come after 8pm on a weeknight instead, when the platforms clear out and the saunas cool down to a pleasant crowd of two or three people.

Guests have to be at least 18, or 14 with written authorization from a parent or guardian. The filming policy is short and strict. Personal filming is limited to capturing yourself only, so do not set up a tripod that catches other lifters in the frame. Phones also do not belong in the sauna, both for privacy and because the heat is hard on batteries.

The club offers member parking and bike parking, which helps on a street where meters fill quickly. Bring photo ID for a day pass, and a lock if you plan to leave a bag in the locker room during a long session. Weekend hours are shorter, 7am to 8pm on Saturday and Sunday, so start a Sunday workout early enough to leave the last hour for the sauna and a shower.

The Castro Muni Metro station sits at Market and Castro, a short walk from the gym, and the K, L and M lines stop there along with the F-Market streetcar on the surface. Harvey Milk Plaza at the top of the station stairs is the natural meeting point if you are training with a friend who is buying a guest-rate pass.

After the sauna, walk down Castro Street toward the Castro Theatre marquee and the Rainbow Honor Walk plaques set into the sidewalk. Several cafes sit along that stretch, and a slow loop to 18th Street and back is a good cool-down. On rainy days, stay underground at the Muni station and ride one stop toward Church instead of waiting at the surface.

Address: 2301 Market Street, San Francisco, CA 94114. Hours: Monday to Thursday 5am to midnight, Friday 5am to 11pm, Saturday and Sunday 7am to 8pm. Day pass $35, or $30 with a member. 7-Day Pass $129. Dry saunas in both the men's and women's locker rooms, with towels provided.

The Karpo APP can line up a Castro workout with a nearby lunch spot or a Muni time back downtown, so a sauna session fits around the rest of your day. Fitness SF also says a new Polk Street club opens on November 1, 2026, which will add one more option to the same city pass.