Ok, short answer is no. Long ago there was a beaver dam crossing back there but its not gonna happen again.
Up by North Post, there is only the Trolley Line trail, which is a paved path thru west windsor, which is currently all fubar due to the powerline work. I think that is what you may be referring to. If you meant the trails to the left heading north out of the rowing center, then they are also lost forever, mostly due to the golf course expansion. No circumnavigation of the lake anymore.
If you know of some other trail, lets find that thing....