This is an old road repurposed as a short trail at Jaymar Park. I know nothing else about it at this time.
The park is named, apparently, after the Jaymar Mill that was on the river to the north of this location.
Concrete ruins of JayMar lumber mill
http://www.panoramio.com/photo/74333974
JayMar cove
http://www.panoramio.com/photo/81473645
JayMar lumber pilings and detritus (Sept low water)