It extends from the southeastern end of the Arborway in Jamaica Plain to Washington Street in the Lower Mills Village of Dorchester.

Most of the road is a connecting parkway, signed as part of Massachusetts Route 203, that provides access to Boston's Emerald Necklace of parks.

Morton Street continues southeasterly from the circle as a four-lane divided parkway signed Massachusetts 203, flanked on the southwest by Forest Hills Cemetery and the northeast by Franklin Park.

It is typically lined by closely spaced wood-frame residential construction, except at the major road junctions, which have commercial or mixed commercial-residential buildings.

The parkway portion of the road (between Shea Circle and Gallivan Boulevard) is listed on the National Register of Historic Places.