The Lake Shasta segment of the NRA was transferred from the National Park Service to the U. S. Forest Service in 1948.

Whiskeytown–Shasta–Trinity National Recreation Area: McCloud River Arm, Shasta Lake (October 28, 2016)
http://rubble.blogspot.com/2016/10/mcloud-river-arm-shasta-lake.html
McCloud River Arm, Shasta Lake (2010)