We, the U.S. Fish and Wildlife Service (Service), announce a 90-day finding on a petition to delist the southern Selkirk Mountains population of woodland caribou (Rangifer tarandus caribou) from the Federal List of Endangered and Threatened Wildlife and Plants as determined under the Endangered Species Act of 1973, as amended (Act). Based on our review, we find that the petition presents substantial information indicating that delisting this population of the woodland caribou subspecies may be warranted. Therefore, with the publication of this notice, we initiate a review of the status of the subspecies to determine if delisting the southern Selkirk Mountains population of woodland caribou is warranted. To ensure that this status review is comprehensive, we are requesting scientific and commercial data and other information regarding the status of the woodland caribou subspecies (Rangifer tarandus caribou), the southern Selkirk Mountains population of woodland caribou, the mountain ecotype of the woodland caribou, and other possible woodland caribou distinct population segment configurations. Based on the status review, we will issue a 12-month finding on the petition, which will address whether the petitioned action is warranted, as provided in section 4(b)(3)(B) of the Act.