Fossil Springs Trail

About Fossil Springs Trail

Fossil Springs is one of Arizona's most remarkable natural swimming holes and a destination that combines a challenging hike with an extraordinary aquatic reward. The springs produce roughly 20,000 gallons of crystal-clear, 72-degree water per minute from the base of the Mogollon Rim, creating a series of vivid turquoise pools, travertine dams, and cascading waterfalls that look like they belong in the tropics rather than the high desert of Central Arizona. The trail descends from the Fossil Springs Trailhead off FR 708 near the community of Strawberry.

The drive to the trailhead on unpaved forest roads takes about 30 minutes from the paved highway and requires a vehicle with reasonable clearance. The trail drops roughly 1,600 feet over four miles, switchbacking through pine and juniper forest before entering a dramatic canyon carved by Fossil Creek. The descent is the easy part.

Keep in mind that every foot you drop on the way in, you must climb on the way out. The return trip is a sustained uphill grind that catches many hikers off guard, especially in warm weather. When you reach the springs, the sight is unforgettable.

The water emerges from the ground at a constant temperature and is supersaturated with dissolved carbon dioxide and calcium carbonate. As the CO2 releases into the air, the calcium carbonate precipitates out, building up the distinctive travertine terraces and dams that create the chain of pools. The mineral content also gives the water its stunning blue-green color, which photographs beautifully but is even more impressive in person.

Swimming in the pools is one of the great outdoor experiences available in Arizona. The water is refreshing without being shockingly cold, and the natural travertine formations create pools of varying depths. Water shoes are recommended for navigating the slippery travertine and rocky creek bottom.

A permit system has been in place since 2016 to manage the heavy visitor traffic that was damaging this sensitive ecosystem. From April through October, you must reserve a $6 day-use permit online through Recreation.gov before your visit.

Permits are released 30 days in advance and popular dates sell out quickly, especially on summer weekends. Plan ahead and book early. Bring plenty of water for the hike, a swimsuit and towel, sun protection, and enough food for a full day.

The combination of the demanding return climb and the temptation to linger at the springs means many groups spend longer here than planned. Dogs are allowed on leash, and the creek provides a great place for water-loving pets to cool off.

Best Time to Hike

Best Season: April through October (permit required)

For the most comfortable experience on Fossil Springs Trail, plan your hike during the recommended season. In the warmer months, start early in the morning to avoid peak heat, especially on exposed desert trails. Always check current weather conditions and trail status before heading out.