The Pleasant Street Incline or Pleasant Street Portal was the southern access point for the Tremont Street Subway in Boston, Massachusetts, which became part of the Green Line after the incline was closed. The portal and the section of tunnel connecting it to Boylston served Green Line streetcars from 1897 to 1901, Main Line Elevated (Orange Line) trains from 1901 to 1908, and streetcars again from 1908 to 1962. The Pleasant Street Incline is now abandoned, but plans have been floated at various times to reuse it.