Designates large tracts of federal land across Idaho, Montana, Oregon, Washington, and Wyoming as wilderness, creates biological connecting corridors, adds river segments to the Wild and Scenic Rivers system, and establishes wildland recovery areas to restore native ecosystems. It sets management rules and prohibitions for corridors, requires restoration and recovery planning, directs scientific study and monitoring (including a GIS and wildlife-crossing study), preserves tribal access and treaty rights, and protects preexisting federal water rights.