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Resort & lodging

Castle Hot Springs

Overnight guests
75–108°F
1 hr 40 min from Phoenix

An adults-only, all-inclusive resort in the desert foothills northwest of Phoenix, reached by a 7-mile dirt road. Three natural-floored spring pools step down from the source at about 104-108°F, 98-102°F and 75-90°F, the last a 9-ft-deep swimming hole. The springs and spa are for registered overnight guests only, and swimwear is required.

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✓ Verified November 2026

Photo: Castle Hot Springs

Price: Overnight guests
Water: 75–108°F
Nearest town: Morristown
From Phoenix: 1 hr 40 min
Reservations: Check venue

Plan your visit

Hours & season

Hours	Hot springs open to guests day and night Cart service available for night visits
Season	Open year-round Historically closed in July-August Stayed open through summer 2026 and is moving to year-round operation

Tickets & booking

Price	Overnight stays only Rates not published Stays include meals, gratuities and resort fees Massages, horseback riding and alcohol cost extra
Access	Overnight guests only
Booking	Book an overnight stay No day passes Spa treatments should be booked at least two weeks before arrival

Rules

Swimwear	Swimsuits required Swimwear required in the hot springs Nudity prohibited
Ages	All guests must be 18 or older
Dogs	No

On site

Pools	3
Lodging	Yes

Not stated by the venue: camping nearby.

Water temperature

60°F75–108°F125°F

Soaking-pool temperatures as published by the venue or land agency; they vary with season and flow.

Mineral profile

Total dissolved minerals

749 mg/L

Moderately mineralized · Sodium–sulfate (sodium sulfate water)

Tap waterMineral waterSeawater

Sodium220 mg/L

Calcium29 mg/L

Magnesium2.3 mg/L

Potassium5.7 mg/L

Chloride140 mg/L

Sulfate220 mg/L

Silica64 mg/L

pH: 7.7
Temp at source: 113°F
Fluoride: 3.1 mg/L
Boron: 0.94 mg/L

Lab analysis of the source water at “B-08-01 34ccc” (0.2 mi from Castle Hot Springs), sampled 1979 by the USGS and partners (data). Pool water may be cooled, mixed or treated, and spring chemistry is generally stable over decades. We report measurements only; we don't make health claims.

The pools

Pool	Temp	Depth
First PoolClosest to the source.	104–108°F	3.5 ft
Second PoolSuited to long soaks and floating.	98–102°F	4 ft
Third PoolLarge deep pool; seasonal paddleboard yoga.	75–90°F	9 ft
Watsu PoolSmall grotto used for Watsu bodywork.	—	—
Cold plungecoldPart of the warm/cold contrast circuit.	—	—

As published by the venue. Temperatures shift with the seasons and the weather.

Facilities

Food on site: yes
Drinks / bar: yes
Restrooms: yes

Good to know	No pets except service animals Elevated resort-casual dress at dinner Some areas are electronics-free

What's here

three spring-fed pools cascading from the source
Watsu grotto pool
cold plunge
Sky View Cabins with private outdoor tubs
Spring Bungalow with stone soaking tub
Harvest restaurant (on-site farm)
Bar 1896
via ferrata course
guided hikes and yoga

Getting there

From Phoenix1 hr 40 min51 mi
From Phoenix Sky Harbor (PHX)1 hr 46 min56 mi

Typical driving time without traffic or snow.

Elevation	2,382 ft
Road	Gravel road, passable by cars Last 7 miles are a rough dirt road High-clearance vehicle such as an SUV recommended About 1 hour north of Sky Harbor
Parking	Uber and Lyft do not serve the resort Helicopter and SUV transfers can be arranged
Cell service	Limited / spotty

Things to do near Morristown

lake

Lake Pleasant Regional Park

Large reservoir park for boating, camping and trails south of the resort.

park

Hassayampa River Preserve

County riparian preserve with shaded trails along the Hassayampa River near Wickenburg.

museum

Desert Caballeros Western Museum

Western art and history museum in downtown Wickenburg.

Trailheads

Maricopa Trail Trailhead at Lake Pleasant Boat Launch10.3 mi
Maricopa Trail Trailhead at Lake Pleasant10.9 mi
Maricopa Trail Trailhead at Beardsly11.9 mi
High Desert Trail Trailhead12.8 mi

Nearby springs

Wild spring

Verde Hot Springs

Camp Verde, AZ

The ruins of a once-famous resort on the Verde River, reached by a short hike upstream and some wading from the Childs dispersed camping area. The last 6 miles to Childs on FR 502 are very rough, and the Forest Service highly recommends high clearance. There is no fee, potable water or garbage service.

Minerals3,140 mg/LSodium–chloride · high silica

FreeView

Day poolsClothing opt.

El Dorado Hot Spring

Tonopah, AZ

A rustic soaking spot west of Phoenix in Tonopah with reservable private soaking areas and a communal, clothing-optional area called Desert Pete for guests 21 and over. Two studios with their own soaking areas and first-come primitive and electric campsites allow overnight stays. Phones are not allowed in the Desert Pete pool area.

Minerals744 mg/LSodium–chloride

From $20View

BathhouseClothing opt.

Kachina Mineral Springs Spa

Safford, AZ

A family-run mineral spa near Safford, operating since 1993, with private indoor soaking tubs reserved for one party at a time and a reservable outdoor mineral pond and hot tub area. Massage and Reiki sessions include time in the tubs. Swimsuits are optional indoors and required outside, where guests must be 12 or older.

Minerals2,070 mg/LSodium–chloride · lithium

Call for pricesView

Verde Hot Springs: 45 mi · El Dorado Hot Spring: 48 mi · Kachina Mineral Springs Spa: 175 mi

Sources (10)

· checked November 2026

Prices, hours and rules are checked against the official site and land-agency pages. Spot something out of date? Let us know.