Arizona Hot Spring is located in a dramatic slot canyon that joins the river just downstream of Ringbolt Rapids. The spring forms several pools that are located about 1,000 feet from the river, where the canyon walls are nearly vertical and about 6 to 9 feet apart. Directly at the source the spring discharges highly mineralized water at a rate of about 30 gallons per minute and a temperature of about 111 degrees Fahrenheit. The spring issues from fractures in Miocene-age volcanic rocks near the intersection of two faults. White Rock Canyon is a strikingly beautiful volcanic area. There is a wide variety of desert plants to be found, including indigo bush, ground cherry, rush-milkweed, rabbit brush, Mormon tea, desert fir, cheesebush, globemallow, desert tobacco, desert trumpet, rock nettle and rock daisy. Rocks encountered during the hike are primarily volcanic, including flow and tuff (ash) deposits, with some granite boulders washed down from Wilson Ridge.