Fall on Cadillac Mountain. At 1,532 feet, Cadillac Mountain in Acadia National Park is the highest point along the North Atlantic seaboard and is the first place to view the sunrise in the United States from October 7 through March 6. Your run starts at the base of the mountain. Onscreen elevation prompts promise to keep you honest during your ascent. When you reach the top, you will circle the summit before your descent and all the spectacular views you earned. 3.5 miles up, 3.5 miles down. Enjoy the sweat!