The Park Loop Road was developed in twelve separate sections between 1921 and 1958; the initial section, funded by the federal government and donations from John D. Rockefeller, Jr., was completed in 1925.
The road includes a spur that leads to the loop from Acadia’s Visitor Center, the main 21-mile section along the shoreline then around and up to the base of Cadillac Mountain (most of which is one-way), and the 3.5-mile side road that winds to the Cadillac Mountain summit.
Most of the Park Loop Road is closed from December 1st to April 15th, unless significant snowfall forces an earlier closure (or a delay in opening). Exceptions are the Ocean Drive stretch providing access to Sand Beach and Thunder Hole, and the Jordan Pond Road coming in from Seal Harbor.
