Agate Reservoir is a 216-acre impoundment located 12 miles northeast of Medford, Oregon. Created in 1966 by an earthfill dam on Dry Creek, the lake features three miles of shoreline and offers views of snow-capped Mt. McLoughlin to the east on clear days.

Only electric motors and hand-powered vessels are permitted on the water. A concrete boat ramp on the western shore provides access through Agate Lake County Park, which includes vault toilets and parking facilities. No parking fees are required, and the lake is open year-round during daylight hours.

The lake has an average depth of over 60 feet and maintains fair water quality, though swimming is not advised. The shoreline is part of the unique Agate Desert geological area, featuring various mineral deposits that visitors can view but are prohibited from collecting.

Wildlife watching opportunities center around the fish population, which includes largemouth bass, black crappie, brown bullhead, bluegill, and yellow perch. The lake is stocked annually with rainbow trout, making it a popular destination for anglers.

Agate Lake County Park provides basic amenities for paddlers, including CXT vault toilets and the boat launch area. The park's day-use facilities are open year-round during daylight hours, though access times may vary seasonally. At 1,510 feet elevation, the lake sits in an open landscape that offers unobstructed views of the surrounding area.

The reservoir serves multiple purposes beyond recreation, functioning as part of the Rogue River Basin Project under the Bureau of Reclamation. While the lake allows paddling and fishing, its primary role includes water storage and management for the region.