Grizzly Bear Review and Resource Restart Act of 2023

This bill removes federal Endangered Species Act protections for grizzly bears (Ursus arctos horribilis) in the lower 48 U.S. states and a specific experimental population in Idaho and Montana. It requires the Secretary of the Interior to remove these bears from the endangered species list within two years of enactment, ending current legal restrictions. The bill also establishes a process for future protections if specific population segments meet recovery criteria, while prohibiting courts from reviewing the removal. This directly affects federal conservation management and land use decisions in states where grizzly bears live, but does not immediately allow hunting or alter existing state management plans.