The Polly Ann Trail is a 36.7-mile long, non-motorized trail in Oakland and Lapeer Counties, Michigan on a former Pontiac, Oxford & Northern Railroad corridor.
The portion of the trail in Oakland County has a crushed stone surface and runs for 16.9 miles from Orion Township to the Oakland–Lapeer county line. Certain sections of the trail in urban areas have an improved asphalt surface. Along the way, trail users pass through the communities of Orion Township, Oxford Township, the Village of Oxford, Addison Township and the Village of Leonard.
In Lapeer County, the Polly Ann Trail continues north with a rougher ballast surface for 19.8 miles to North Branch Township. The trail is clear and maintained in Dryden Township, Dryden Village and Imlay City, with the latter community featuring a paved stretch. The rest of the trail is largely unimproved and may be rough, uneven and wet in spots.