BAR HARBOR — Maine parks officials want to remind residents and tourists Acadia National Park will remain open during President Barack Obama’s visit but there could be delays and detours.

Obama is scheduled to arrive today on Mount Desert Island for a three-day visit. He’s the first sitting president to visit the island since William Howard Taft a century ago.

Bar Harbor and three other towns are on the island. Much of the land is owned by Acadia National Park, which was established in 1916 and offers hiking trails, spectacular scenery and ocean views.

Park Superintendent Sheridan Steele says visitors should expect delays and detours without warning while Obama is around. Steele says it’s best to visit the park before 10 a.m. or after 6 p.m., when it’s usually quieter.