Maine Route 179 parallels the east side of Graham Lake. The frontage on this nine-mile lake, which also touches Ellsworth, Mariaville, and Fletchers Landing, has encouraged some developers to consider creating subdivisions near its shores. Route 200, also known as Cave Hill Road, connects the community to Eastbrook.
Osborn hosts two lots of Maine’s Public Reserved Lands with many trees well over 100 years old. The Osborn lots have a long history of timber management. Spectacle Pond, through which the Union River flows, is a major asset of the town. With few major roads, it is served in its northwest corner by Maine Route 179.
The town, with substantial frontage on Graham Lake and the east and west branches of the Union River, was named for William Bingham’s daughter Maria. With over 17% of its area covered with water, it is one of the most water-covered non-coastal towns in the state. While somewhat remote twelve miles north of Ellsworth, the town has a small but consistently growing population.