Actually, there is a walkway that circles the DTD/SSR "lake". The segment that runs from the Disney Marketplace end - by the bus stops - to the CP section of SSR is marked, lit and IIRC has a map of SSR. If you are by the West End, you can walk towards the golf course, then cross over to the Town Center area of SSR; I'm less sure how accessible and lit this is.
The walk itself is quite pleasant....