River Trolley Park was an urban park on the banks of the Presumpscot River open at the beginning of the 20th Century. There was a casino and an open air theater. A streetcar ran from Portland’s downtown up Forest Avenue to the park.

There are detailed stories, and timelines, of Riverton Trolley Park here, here and here. Some of these links have pictures showing how the park used to look.

Portland Trails has made walking trails on the site of the ruins on both sides of the Presumpscot River.