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Diablo Range / Fresno County, California

Mercey Hot Springs

Mercey Hot Springs is a remote desert-hills resort west of the San Joaquin Valley with outdoor hot tubs and a warm swimming pool. Day visitors must reserve and prepay, and children are welcome in the pool but not in the clothing-optional tub area.

OpenOpen year-round; day use by prepaid reservation.Last checked November 2026
Water
102–106°F (hot tubs); 85–90°F (pool)
Getting there
Drive up on Little Panoche Road, about 35 mi from Los Banos
Children
All ages
Clothing
Clothing optional at the outdoor hot tubs and private tubs (18+); swimsuits required elsewhere
Cost and hours
See current prices and hours on the official site
Pools
Outdoor hot tubs, private indoor tubs and a heated swimming pool
Reservations
Required
Stay the night
Cabins and camping on site
Managed by
Private resort

Good to know. No cell coverage on site, and the nearest town is about 40 minutes away.

In any natural hot spring, keep your head above the water. Health officials advise it because of a rare amoeba that can enter through the nose.

Good for: quiet soaking, camping, winter trip. Something out of date? Let us know and we’ll check it.

Warm water, closer to home

No hot spring nearby?

Warm-water sessions at your own pool, or your community’s, in and around Flagstaff, by request. And there are small water practices you can do at home, in a bath.

See sessions Practices for home