At two and a half miles long and 250 surface acres, Patagonia Lake is popular for a variety of recreational activities, including water skiing, fishing, camping, picnicking, and hiking. Created by the damming of Sonoita Creek, the lake is filled with bass, crappie, bluegill, and catfish, and is stocked with rainbow trout during the winter. For anglers' sake, half of the lake is designated a no wake area. A level fishing pad is provided for wheelchair access. Because the lake attracts a multitude of water lovers during summer months, water skiing and jet skiing are prohibited on weekends and holidays from May 1 through October 1.
Camping ranges from undeveloped spots to sites with water and electric hookups.
Park conveniences include picnic ramadas, a swimming beach, and a marina store with boat rentals.