The half route changed 2 years ago so that it would start and finish in Epcot. Before it started in Epcot and ended at the TTC. Currently the only parks it goes through is MK and the Future World part of Epcot.
The full goes through MK, AK, MGM and Epcot(twice). It goes by the intersection to get to WWoS but doesn't run through that area.
Thanks Bill. Any advice for spectators? We're going to watch DD. Before I got old and had my knee replaced, I actually ran a few myself. (and finished too)