Castle Hot Springs

What to expect

Castle Hot Springs is the opposite of a roadside soak. It is a small, expensive, all-inclusive resort in a canyon in the Bradshaw Mountains, northwest of the Phoenix metro area, and the hot springs are only for people staying the night. If you want a free or cheap natural soak, this is not it. If you want a historic spring resort with the pools to yourself at 2 a.m., it is one of the few places in the Southwest that does that.

The spring water comes out of the canyon hillside and feeds a chain of pools built into the slope. The resort says the water is heated by hot rock rather than volcanic activity, so it has no sulfur smell, and it lists lithium, magnesium, iron, sodium and calcium among its minerals. The pool floors are natural sediment rather than poured concrete, which is unusual for a resort.

The property covers about 1,100 acres of Sonoran Desert, with 31 standalone bungalows plus a set of Sky View cabins, a lodge with the Harvest restaurant and Bar 1896, a working farm and a resort swimming pool. Spring Bungalows come with private soaking tubs.

The pools

Pool	Temperature	Depth
First pool (nearest the source)	about 104-108°F40-42°C	about 3.5 ft
Second pool	about 98-102°F37-39°C	about 4 ft
Third pool (swimming)	about 75-90°F24-32°C	about 9 ft
Watsu grotto	not published	not published

Water cascades from the first pool into the second, cooling as it goes, then into the large third pool. The small grotto is used for Watsu sessions, a form of floating bodywork booked as a spa treatment. The resort also lists outdoor soaking tubs, a cold plunge tub and creekside hammocks. The springs stay open all night, and a 24-hour courtesy cart runs between the rooms and the pools.

Prices and booking

Castle Hot Springs sells overnight stays only. There is no day pass for the springs, the spa or the restaurant, and events are aimed at registered guests. All guests must be 18 or older.

The resort does not publish rates outside its booking engine, so treat any figure here as a guide. In a fall 2026 review, Oyster put shoulder-season rates at about $1,250 a night for a Sky View Cabin, climbing past $1,650 a night once peak pricing starts in January, with November the cheapest month of the season. The same review said check-in is offered only on Sundays, Tuesdays and Thursdays. Confirm arrival days and any minimum stay when you book.

What the room rate covers, according to the resort:

• Food: breakfast, lunch and a multi-course dinner daily, plus bar snacks, soft drinks and poolside food.
• Activities: guided hikes, archery, farm and history tours, yoga and meditation, cruiser bikes, pickleball, lawn games and a chipping green.
• Springs and pool: unlimited, 24-hour use.
• Service: gratuities on food, activities and spa services, valet parking and the courtesy cart. There is no resort fee.

Extra charges apply for alcohol and specialty drinks, spa treatments, private wellness classes and add-on adventures such as the via ferrata, rappelling, UTV tours, horseback riding and tastings. A 20% service charge is added to purchased drinks and amenities. Spa treatments should be booked at least two weeks ahead.

Swimwear is required in the hot springs, and nudity is not allowed. Dinner at Harvest has a dress code: elevated resort casual, collared shirts for men, no caps, flip-flops or athletic wear. Book online at castlehotsprings.com or by phone at (855) 375-4005.

Getting there

The resort is about an hour north of Phoenix Sky Harbor Airport. The usual approach is from the south: head northwest out of Phoenix toward Lake Pleasant, then turn north onto Castle Hot Springs Road and follow it into the hills to the resort at 5050 Castle Hot Springs Road. The final 7 miles are dirt. The resort says the road can be rough and recommends an SUV or other high-clearance vehicle, especially after rain.

Uber and Lyft do not serve the property. The resort arranges transfers by SUV and by helicopter from Scottsdale Airport. RVs, campers and trailers cannot be accommodated. There is an EV charger on site.

When to go

Peak season is November to April, when the desert is cool enough for long hikes and evenings in the hot pools feel right. Oyster singles out October as a good hiking month. Until 2026 the resort shut for the hottest part of the year. For its 130th anniversary it stayed open through July and August for the first time, with summer programs such as night sound baths, full-moon hikes and a resident discount valid from May 21 to September 30, 2026. Summer days here are very hot, so plan activities for early morning and evening.

History

The resort’s timeline starts in 1896. Early guests faced a five-hour stagecoach ride until a train depot opened nearby in 1898. Over the following decades it became a winter retreat for wealthy families; the resort lists the Rockefellers, Pews, Vanderbilts and Astors among its guests, along with Theodore Roosevelt and the painter Maxfield Parrish, who spent the winter of 1901-1902 there. In the 1940s it served as a rehabilitation center for World War II servicemen, and a young John F. Kennedy recuperated there.

Fire destroyed the Palm House in 1976 and the Wrigley Cottage in 1996, and many of the remaining buildings were later torn down. An Arizona couple bought the property in 2014 and reopened it in 2019 after rebuilding. It is a member of Historic Hotels of America.

Where to stay nearby

The only way to use the springs is to stay at the resort. For a cheaper base to explore the area, Lake Pleasant Regional Park, a Maricopa County park on the way out from Phoenix, has campgrounds by the lake, and the north Phoenix suburbs have plenty of hotels. Neither gives you access to the springs.

Safety notes

• Road: drive the dirt section slowly, and check conditions after monsoon storms (July to September), when washes can flood.
• Hot water: the top pool runs up to about 108°F42°C. Keep soaks short, drink water and get out if you feel lightheaded.
• Heat: desert hikes from the resort are exposed. Carry water and start early, particularly from May to September.
• Signal: cell service is limited, so download directions before you leave the highway.