San Carlos Lake, Reservoir in Gila County, Arizona, United States

San Carlos Lake is a reservoir on the Gila River in Arizona, formed by Coolidge Dam in 1930. It covers 79 square kilometres within the San Carlos Apache Indian Reservation and has a shoreline of 158 miles. The water lies between rocky shores, with a band of pale rock and tan, reddish-brown earth rising into low hills behind it.

The lake was created by building Coolidge Dam, which was dedicated in 1930 by President Calvin Coolidge and features a distinctive egg-crate style of construction. After decades of water accumulation, the basin eventually filled and has since supported farming irrigation in downstream areas.

The lake sits within San Carlos Apache tribal lands, and visitors experience the area as a place governed by tribal rules and customs. The local communities show deep respect for the land and water, maintaining it for both present and future generations.

The lake is best reached from Highway 70, and visitors should know that all activities like fishing, camping, and hiking require a permit from the local tribal authority. The roads around the lake have some uneven sections, so a vehicle with good ground clearance is recommended.

Water levels at this reservoir change dramatically with seasons and water availability, causing fish populations to fluctuate, especially when levels drop significantly. Visitors can spot interesting rock formations and shallow brush-lined areas at popular fishing spots like Old Government and Catfish Bay that create excellent hiding places for fish.