| Agua Caliente County Park | San Diego & Imperial Backcountry | Town & Family Pools | County campground: about 140 tent and RV sites (some with hookups) and camping cabins | Yes | — | 90–102 °F | — |
| Avila Hot Springs | Central Coast | Cabins, Ranches & Private Rentals | Tent and RV campsites; cabins (official site lists monthly cabin rentals) | Yes | Adults 16+ $29, ages 15 and under $26, seniors 55+ $26; morning pass (8am-noon) $18, Sundowner (after 5pm) $18 | 104 °F | Required |
| Azure Palm Hot Springs | Greater Palm Springs | Wellness Retreats & Eco Lodges | 22 spa suites with private in-room mineral water tubs | Yes | Oasis Day Pass $79 plus $1 per pass for the city's children's program; $10 off the pass when booking a spa treatment | 104 °F | Required |
| Calistoga Spa Hot Springs | Napa Valley | Big Resorts & Iconic Pools | Hotel rooms with kitchenettes | No | No standalone day pass: pool access for non-guests only with a spa treatment (pool pass price not published); Plus One companion of a spa guest $75; Extended Pool Pass for departing hotel guests $50 (ages 2+, until 9pm) | 104 °F | — |
| Death Valley Hot Springs (formerly Delight's Hot Springs Resort) | Amargosa Valley | Big Resorts & Iconic Pools | Cabins, cottages, motel rooms, RV park | Yes | Day pass Mon $30, Tue-Wed $25, Thu $30, Fri-Sun $35 (8am-5pm); night pass $35 after 4pm | 102–104 °F | — |
| Dr. Wilkinson's Backyard Resort & Mineral Springs | Napa Valley | Historic Spas & Vapor Caves | Hotel rooms (type and count from third-party pages only) | Yes | Daycation Pass from $90 ages 5+, ages 0-4 free (up to 2 per adult) via ResortPass; daybed from $168 for 2, cabanas from $224 for 2 | 104 °F | Required |
| Esalen Institute Hot Springs | Central Coast | Wellness Retreats & Eco Lodges | Workshop and retreat stays: shared and private rooms, bunk rooms, sleeping bag spaces, yurts and suites; three meals daily included | Yes | Healing Arts day pass from $380 (includes one massage or bodywork service, three meals and hot springs access 8:30am-8:30pm), extended hours +$110; stays from $560 for 2 nights (sleeping bag space) to $3,160-$5,300 for 2 nights (suites), meals included | — | Optional |
| Fairmont Sonoma Mission Inn & Spa | Sonoma Valley | Big Resorts & Iconic Pools | Resort hotel | Yes | Spa day access: resort guests $69 per person per day, non-resort guests from $99 to $199 per person; access fee waived for non-resort guests booking qualifying spa services Mon-Thu (excluding holidays), Fri-Sun a $59 access fee applies on top of treatment price | — | Required |
| Franklin Hot Springs | Central Coast | Cabins, Ranches & Private Rentals | Campground only (tent and RV sites) | Yes | Adults $10, under 14, seniors and military $8 (all-day pass); camping $30 tent or RV, sites $75-85, plus admission | 97–100 °F | Required |
| Gaviota Hot Springs | Santa Barbara & Ojai Backcountry | Wild Natural Springs | No | No | Springs free; $2 trailhead parking fee (hikespeak, updated 2025-12-06, checked 2026-10-12) | 95–100 °F | — |
| Glamis North Hot Springs Resort | San Diego & Imperial Backcountry | Cabins, Ranches & Private Rentals | RV sites, camping cabins, tent/dry camping | Yes | — | — | — |
| Glen Ivy Hot Springs | Inland Empire | Big Resorts & Iconic Pools | No | Yes | Day pass from $75 Mon-Fri / from $95-$105 Sat-Sun (October 2026), from $75 / from $85-$95 (November-December 2026); Deal of the Day from $65 on select days; evenings-only $60 (Fri-Sun, October 2-25) | 104 °F | Required |
| Golden Haven Hot Springs Spa & Resort | Napa Valley | Big Resorts & Iconic Pools | 28 hotel rooms, some with private hot springs spas, plus two-bedroom units | No | No day use of the pool; complimentary pool access with any spa treatment: couples and friends mud bath $128 per person Mon-Thu / $138 Fri-Sun and holidays, single mud bath $169 | 85–104 °F | Required |
| Grover Hot Springs State Park | Northern Sierra | Town & Family Pools | Campground only (state park campground, 76 sites; winter campground) | Yes | Pool: adults $10, children $5; day-use parking $8 per vehicle ($7 seniors) | 102–104 °F | Required |
| Harbin Hot Springs | North Coast Ranges | Wellness Retreats & Eco Lodges | Grove Cottages, Harbin Domes, Creekside Caravans + camping (meadow and car camping) | Yes | Membership required for all guests 18+: one month $15, one year $35, lifetime $300 (members may bring up to 3 children 0-17). 6-hour day visit: adults $45/$55, children $25 (weekdays/Fri-Sun); 3-hour Harmony Pass adults and children $25/$30; 3-hour Lake County Local Pass $20/$25 (proof of residence); 24-hour visit with camping adults $60/$75, children $40/$55; $5 walk-in fee without online reservation | 98–115 °F | Optional |
| Hilltop Hot Spring (Pulky's Pool) | Long Valley & Mammoth Lakes | Wild Natural Springs | No | No | Free | 100–110 °F | Optional |
| Hunt Hot Springs | Pit River Country | Wild Natural Springs | Campground only (Hipcamp listing Kosk Creek Campgrounds: 30 first-come sites, tent and RV, no hookups, no potable water) | Yes | Day pass $15 per person | 100–120 °F | — |
| Indian Springs Calistoga | Napa Valley | Big Resorts & Iconic Pools | Historic cottages, bungalows and lodge rooms on 17 acres | No | No standalone day pass: pool pass $50 for day spa guests who book a 50-minute spa service, limited number, every day except Saturday, reserve in advance | 92–102 °F | Required |
| Jacumba Hot Springs Hotel | San Diego & Imperial Backcountry | Historic Spas & Vapor Caves | Hotel of about 20 rooms for adults 21+ (hiddensandiego.com); suites, casitas with private soaking tubs, The Lodge, The Village House and La Ranchita guest house (official homepage); off-site casitas allow children and pets | Yes | Ritual Pool Pass from $25, Solstice Pool Pass from $50, Ritual Star Soak (evening) Pass from $20; pool access 21+ (official /pages/pool-pass, checked 2026-10-12) | 90–103 °F | — |
| Kosk Hot Springs | Pit River Country | Wild Natural Springs | Campground only (Hipcamp listing Kosk Creek Campgrounds: 30 first-come sites, tent and RV, no hookups, no potable water) | Yes | Day pass $15 per person | 100–110 °F | Optional |
| Marin Tidal Hot Springs (Rocky Point Hot Springs) | Marin Coast | Wild Natural Springs | No | No | — | 100 °F | — |
| Morton's Warm Springs Resort | Sonoma Valley | Town & Family Pools | No | Yes | Day visit sliding scale (online): standard $23, Replenish $30, hardship $18 Tue-Fri / $20 Sat-Sun and holidays; $25 at the gate without reservation; ages 2 and under free (swim diaper required) | 90 °F | Required |
| Murrieta Hot Springs Resort | Inland Empire | Big Resorts & Iconic Pools | Resort hotel rooms and suites | Yes | Hot Spring Day Pass from $109; Twilight Pass (from 4pm) from $59; Local Resident Day Pass from $59 with local ID; children 2 and under free | — | Required |
| Orr Hot Springs Resort | North Coast Ranges | Wellness Retreats & Eco Lodges | Rooms, yurts, cottages and a creekhouse + camping; shared communal kitchen, no food sold on site | Yes | Day use $50 per person; rooms and yurts $260 + tax per night for 1-2 adults; cottages and Creekhouse $325 + tax per night for 1-2 adults; additional adult $80; camping $80 + tax per adult, $35 per child (no children under 9) | 104–108 °F | Optional |
| Remington Hot Springs | Kern River Valley | Wild Natural Springs | No | No | Free; free dirt parking lot for about 15 cars (hotspringsguides updated 2026-09-21, checked 2026-10-12) | 100–106 °F | — |
| River Oaks Hot Springs Spa | Central Coast | Historic Spas & Vapor Caves | No | No | Private mineral spa 1 hour $30 per person; Tue-Wed midweek special 2 people $38; Sip & Soak 1 hour $65 per guest; towel rental $3 | — | — |
| Rock Tub Hot Spring (Whitmore Tubs) | Long Valley & Mammoth Lakes | Wild Natural Springs | No | No | Free | — | Optional |
| Roman Spa Hot Springs Resort | Napa Valley | Big Resorts & Iconic Pools | Hotel rooms and suites (Classico, Superiore, Splendido Suite with Jacuzzi tub) | No | No standalone day pass: pool access for spa guests with a treatment of 45 min or more, Sunday-Friday, extra charge not published; mud bath $145 Mon-Fri / $150 Sat-Sun, mineral bath $110 | 92–103 °F | — |
| Saline Valley Palm Spring | Death Valley National Park | Wild Natural Springs | No | No | Death Valley NP entrance fee: $30 per private vehicle, $25 motorcycle, $15 per person on foot or bicycle (all valid 7 days), annual pass $55; no separate fee for the springs | 98–112 °F | Optional |
| Sam's Family Spa Hot Water Resort | Greater Palm Springs | Cabins, Ranches & Private Rentals | Motel rooms, tiny homes, RV sites | Yes | Day pass $25 Mon-Fri / $30 Sat-Sun and holidays, ages 4 and under free, pets $10 | 104 °F | — |
| Sespe Hot Springs | Santa Barbara & Ojai Backcountry | Wild Natural Springs | No | No | Springs free; Adventure Pass required to park at Piedra Blanca and Johnston Ridge trailheads (hotspringsguides updated 2026-09-21; calihotsprings) - checked 2026-10-12 | 105 °F | Optional |
| Shepherd Hot Spring | Long Valley & Mammoth Lakes | Wild Natural Springs | No | No | Free | 100–110 °F | Optional |
| Shoshone Hot Springs Pool | Amargosa Valley | Town & Family Pools | Shoshone Inn (17 rooms), campground, RV park, vacation rentals | No | Included with an overnight stay; not sold as a standalone day pass | 90 °F | — |
| Sierra Hot Springs | Northern Sierra | Wellness Retreats & Eco Lodges | Main Lodge rooms, Globe Hotel rooms in Sierraville, tent/RV campground (no hookups) | Yes | Day use (Thu-Sun 10:30am-5:30pm): adults $35 Thu-Fri / $40 Sat-Sun and holidays, children $25; evening soak (Wed-Sun 4-11pm): adults $35 Wed-Thu / $40 Fri-Sun and holidays; membership required for at least one person per party (30 days $5, 1 year $20, lifetime $300); lodging from $160/$198 per night (Wed-Thu / Fri-Sun, double occupancy, tax included); camping $45/$60 per person per night | 95–112 °F | Optional |
| Surprise Valley Hot Springs | Surprise Valley | Cabins, Ranches & Private Rentals | Standard and deluxe rooms and 1-2 bedroom suites, each with a private hot springs tub (15 outdoor, 4 indoor) | No | No day use; rooms Sun-Thu / Fri-Sat: Standard $117/$147, Deluxe $137/$167, 1-bedroom suite $147/$177, 2-bedroom suite $167/$197, plus 4% bed tax; two-night minimum | — | — |
| Tassajara Zen Mountain Center (Tassajara Hot Springs) | Central Coast | Wellness Retreats & Eco Lodges | Summer guest season only: creekside cabins, mountain path cabins and yurts, shared dorms; three vegetarian meals daily included | No | — | — | Optional |
| Tecopa Hot Springs Park and Campground | Amargosa Valley | Town & Family Pools | Campground with 200+ sites, some with electric hookups | Yes | Bath pass $10/day, $65/week, $200/month; private pool $25/hr ($10/hr for campers); campsites from $21 | — | — |
| Tecopa Hot Springs Resort | Amargosa Valley | Cabins, Ranches & Private Rentals | 12-room motel, 4 cabins, campground | Yes | Day pass $20/person; included for overnight guests | 104 °F | — |
| Tecopa Palms Therapeutic Hot Springs Resort | Amargosa Valley | Wellness Retreats & Eco Lodges | Tiny house, cabins, bunk house, RV and dry camping sites | Yes | Pool pass $30/person; $25 for age 62+, military, or groups of 4+ | 102–104 °F | — |
| The Inn at Benton Hot Springs | Bridgeport & Northern Mono County | Cabins, Ranches & Private Rentals | Inn rooms (breakfast included), cabins, house rentals, vintage Airstream; 15 tub campsites with private hot tubs (no hookups) | No | Tub sites $95/night (sites 1-3, 11-12, up to 2 people) or $105/night (sites 4-10 and 13, up to 3 people), extra person $10; Dark Skies sites 14-15 $125/night (max 2); inn rooms $169/night for 2, extra guest $15/day | 98–108 °F | Optional |
| The Inn at Death Valley | Death Valley National Park | Big Resorts & Iconic Pools | Historic 66-room hotel plus 22 casitas | No | Pool is exclusive to Inn guests | 87 °F | Required |
| The Ranch at Death Valley | Death Valley National Park | Big Resorts & Iconic Pools | Hotel rooms and cottages inside Death Valley NP | Yes | Pool passes sold to the public at the Ranch registration desk; price not published online | 87 °F | Required |
| The Spa at Séc-he (Agua Caliente Cultural Plaza) | Greater Palm Springs | Historic Spas & Vapor Caves | No | Yes | Taking of the Waters day pass $135 Mon-Thu / $165 Fri-Sun and holidays; with a spa service of $200+ the pass is $25 / $35 | 105 °F | Mixed |
| Travertine Hot Springs | Bridgeport & Northern Mono County | Wild Natural Springs | No | No | Free | — | Optional |
| Tuscan Springs Hotel & Spa | Greater Palm Springs | Wellness Retreats & Eco Lodges | 16 boutique hotel rooms (Garden and Mountain View Private Terrace), continental breakfast included | Yes | Day use of pools and dry sauna $50 per person for 4 hours; pool use free with any spa treatment at La Bella Spa | — | — |
| Two Bunch Palms Resort & Spa | Greater Palm Springs | Wellness Retreats & Eco Lodges | Rooms and suites (67 per hotspringsguides.com) | Yes | — | — | — |
| Vichy Springs Resort | North Coast Ranges | Historic Spas & Vapor Caves | Rooms, suite and cottages (26 rooms and cottages; three cottages built in 1852 still in use) | Yes | Day use per person (2026): up to 2 hours $45, up to 3 hours $65, all day $110, all day with a spa service $55; towel rental $3, swimsuit rental $3, bathrobe rental $13; holiday periods two-hour day use only | — | Required |
| Wilbur Hot Springs | North Coast Ranges | Wellness Retreats & Eco Lodges | Cabins, cabin suite, Solar Lodge rooms, historic hotel rooms, bunk room + seasonal camping (April-October) | Yes | Day use $68.82 weekdays, $76.59 weekends and holidays (10am-5pm, includes 11% land management fee); no children or senior rates listed | 100–109 °F | Optional |
| Wild Willy's Hot Spring | Long Valley & Mammoth Lakes | Wild Natural Springs | No | No | Free | 95–105 °F | Optional |