ACADIA NATIONAL PARK, Maine — Acadia National Park officials say there is a search going on at the park for 50-year-old Tim Philpott of Ellsworth.

He’s described as a white man, 5 feet 9 inches tall, 150 pounds and was last seen wearing brown pants and a black nylon jacket.

Park staff noticed his car parked at the Parkman Mountain parking area off Route 198 in Mount Desert around 9 a.m. on Tuesday. They became concerned when they saw his car in the same spot on Wednesday, since there is currently no overnight camping at the park.

Park staff started investigating his whereabouts, and started contacting his family and friends. Sometime on Thursday, they determined that the last time anyone had contact with Philpott was on 4 p.m. Tuesday.

Park rangers did a search Thursday on trails off Parkman Mountain, Sargent Mountain, Bald Peak and Gilmore Peak. The search is expanding and includes members of the Maine Warden Service, volunteers from the Maine Association of Search and Rescue team, park staff and a helicopter from the Maine Forest Service.

There are about 25 volunteers working in several teams searching the areas, expanding off designated trails that were searched Thursday. It’s about a 4- to 5-square-mile area. The search will continue until it gets dark Friday.

If Philpott isn’t found by the end of the day on Friday, the search teams will reassess the situation at the end of the day and determine how to proceed. Weather conditions predicted for Saturday are not good for searching.