Bridge Mountain and Red Rock Canyon National Conservation Area are both managed by who?
Bridge Mountain:  It is located on land managed by the United States Bureau of Land Management as the Red Rock Canyon National Conservation Area, part of the Rainbow Mountain Wilderness. Red Rock Canyon National Conservation Area: The Red Rock Canyon National Conservation Area in Nevada is an area managed by the Bureau of Land Management as part of its National Landscape Conservation System, and protected as a National Conservation Area.
Bureau of Land Management