Press release from Pleasanton police department
http://admin.cityofpleasantonca.gov/civicax/filebank/blobdload.aspx?BlobID=35543
It says the body was found 1/4 mile from the intended route.
Erik Silacci in the press conference shown on KRON4 says it was found north of Moller Ranch.
Here is the press conference posted on Youtube by KTVU
They think he did not make the turn to go back that he should (maybe the turn he is referring to is the trail through landbank area from Pleasanton Ridge to the Moller Ranch----IMO they are referring to what is called the "Lying Stump Shortcut Trail" on Strava)
From what I am interpreting them to say is that assuming he went around the loop on the ridgetop he overshot and did not make that turn or maybe perhaps my opinion only maybe he could not make the turn because he could not at that point have the energy to climb over the gate perhaps.
It sounds like he continued north instead, then went off the official trail.
Or maybe he never went around the loop, but only went a small section on it, then tried to cut through to go north off trail once he was on the Pleasanton Ridge loop trail. It is hard to say at this point. Hopefully they will figure out what happened.
Another idea I have is since they said it was north of Moller Ranch and they never saw him on ring video is that he went to the Preserve which is north of Moller Ranch and tried to access Pleasanton Ridge from the Preserve instead. The Preserve is north of Moller Ranch so maybe that is how he ended up where he was found.