I graduated from there in (cough ahem****). If you go to the west side of the park at ridge road take the street north just over the bridge. Down past the old Woodmar Country Club there is an underpass to get to the other side of 80/94.
Yea, I'm a PUC grad too. Until they get the Eric Lackawana trail completed, your best bet is the road just West of it, like Torgrot said (plus it really isn't that busy of a road!). The EL is a great trail. Here's a map of the trails of NW Indiana: http://www.geocities.com/huffmun/Bike_Maps.html .
Well, I finaly did it! Went the whole way on Indianapolis ! I need to find that side road... it might be 10 minuets out of the way, but thats better than being a hood orniment for a Semi ! If I cant find the road on the net today, I'll try taking Kennedy home.... My wife is going to kill me, but I might just get into this!.... My legs are Jello, My lungs were on fire and my fatt but is saddle sore... Damn I feel good!
Found it! Northcote... Runs paralel to the bike path... I havent taken the bike path... The on-line map shows that it dead ends... but where? I'll ride it home on monday... I've got a feeling it dead ends right at the construction site for the New cabella's store....