Clear Lake National Wildlife Refuge, Wildlife refuge in Modoc County, California.

Clear Lake National Wildlife Refuge is a large nature reserve on the high plateau of northeastern California with a lake surrounded by varied habitats. The shoreline features sagebrush, juniper, and bunchgrass, while the lake itself holds open water and small rocky islands.

Clear Lake National Wildlife Refuge was established in 1911 on the high plateau of northeastern California. Its lake water is held and regulated by a dam, and that stored water irrigates croplands in the eastern Klamath Basin. The reservoir is managed by the Bureau of Reclamation, which controls water levels in the refuge.

The refuge lies about 50 miles southeast of Klamath Falls, Oregon, and 15 miles southeast of Tulelake, California. Its name comes from the shallow lake at its centre, whose water level is controlled by a dam and used to irrigate croplands in the eastern Klamath Basin. The refuge is closed to the public, so the birds and pronghorn are watched from outside its boundary.

The refuge is normally closed to visitors and can only be entered during hunting season for regulated waterfowl and pronghorn hunting. The best time to watch wildlife is from a distance during spring and fall migration when most birds pass through.

The refuge's water level is controlled by a dam on Clear Lake Reservoir, and that stored water irrigates croplands in the eastern Klamath Basin. The reservoir is the basin's primary water source, managed by the Bureau of Reclamation. Visitors cannot enter the refuge, so the lake and its birds are seen only from outside its boundary.