The correct option is 2.
Summer Lake is a large, shallow, alkali lake in Lake County, Oregon, United States. At high water it is about 15 miles (24 km) long and 5 miles (8 km) wide, and is located 5 miles (8 km) south of the small, unincorporated community of Summer Lake, Oregon. The lake was named by explorer John C. Fremont on his expedition into Central Oregon in 1843. The marshes around the lake support a wide variety of birds and other wildlife.