Agua Caliente Spring
Agua Caliente Spring near Arivaca Junction flows at 90 degrees Fahrenheit at 3,882 feet elevation, emerging 23.6 degrees above ambient in Pima County. This roadside-accessible spring lies in Arizona's semi-desert grasslands within reach of Tucson, offering genuinely thermal waters in a high desert setting.
Located just 24.5 meters from the nearest road, the spring sits in rolling grassland terrain characteristic of southern Arizona's transition zone. The landscape features scattered oak and juniper, with mountain views toward the Coronado National Forest and surrounding basin-and-range topography creating a scenic approach.
The spring's thermal output results from deep groundwater circulation through the complex geology of southern Arizona, where basement rocks conduct heat from depth. The name Agua Caliente reflects Spanish recognition of these warm waters in a region of significant geothermal gradient.
Access is straightforward from nearby roads in the grassland country. The spring remains accessible year-round, with cooler months offering more comfortable soaking. Be prepared for dry conditions and minimal shade; bring water and sun protection for any extended visit.
Is Agua Caliente Spring worth visiting?
Best for
- Warm-water soaking
- Easy day trips
- Overnight camping trips
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