Diaz Lake is an 80-acre body of water located 3 miles south of Lone Pine, California along Highway 395. The lake features a boat launch ramp and is open year-round for non-motorized watercraft including kayaks, canoes, and paddle boards. Motorized watercraft are permitted from May 15 through October 31, with a limit of 25 boats per day.

The lake sits against the dramatic backdrop of the Eastern Sierra Nevada range, offering paddlers views of Mount Whitney and the Alabama Hills. Its location between the Owens River Valley and Sierra Nevada creates opportunities for wildlife viewing and scenic photography.

All watercraft must undergo inspection for quagga mussels prior to launching. Boat hours are 8:00 AM to 6:00 PM Thursday through Monday, and 8:00 AM to 2:00 PM Tuesday and Wednesday. The lake experienced harmful algal blooms in 2024, so paddlers should check current conditions before planning water activities.

Facilities include vault toilets, limited water spigots, and an ADA-accessible fishing deck near the boat launch. The adjacent campground offers 100 camping spaces with fire rings and picnic tables. Day use areas feature covered picnic tables and a playground.

The lake's proximity to Highway 395 provides easy access but can mean some traffic noise. Summer temperatures can be quite warm in this high desert environment. The lake is primarily used for fishing, paddling, and swimming, with water skiing also permitted during motorized boat season.

Note that boat reservations are available for 5 of the 25 daily watercraft spots by contacting the front desk. The remaining spots are first-come, first-served. A $10 daily fee applies for motorized watercraft.