Rescuers in Yellowstone National Park searched the area of Eagle Peak on Sunday in an effort to find a park concession worker who failed to check in at the end of a personal trip, authorities said.

Austin King, 22, missed that check-in, at which he was to be picked up by a boat at Yellowstone Lake’s Southeast Arm on Friday following a weeklong trek on and around Eagle Peak, the National Park Service said in a statement.

On Sunday, more than 20 searchers on the ground were aided by two…