Castle Hot Springs
Morristown · Yavapai County (Bradshaw Mountains)

A restored historic resort in the Bradshaw Mountain foothills, about an hour north of Phoenix Sky Harbor, with three cascading spring pools at 104 to 108°F, 98 to 102°F and 75 to 90°F, open all night to guests. The catch is that it admits registered overnight guests aged 18 and over only, with no day passes. The last 7 miles are dirt and the resort recommends a high-clearance vehicle, which is a fine thing to learn before you arrive in the rental. The resort says the water carries lithium, magnesium, iron, sodium and calcium.
From Castle Hot Springs, last checked 19 September 2026.