You can droios Perry hiway and go down East ST (Or Baytree or Gould st to East St). East ST is a little trafficly - when I go up East St, I generally stick to the sidewalk.
At teh bottom of East, R on Ohio to the Commons and L accross the 7h street bridge into town.
Many ways across town and into Oakland.
On Forbes/Fifth
I'd take 7th then R on Penn, L on 6th St, L up the 5th ave bus lane, R past the courthouse over to Forbes (same way the buses go).
About 1 mile out on Forbes, L on Jumonville to the Fith Ave bus lane and out the bus lane.
On the Jail trail.
&th St R on Penn, Left on 6th, across market Square and though the PPG plaza to Market St. L on Blvd of the allies, L on grant, cross Grant to the Jail trail which starts behind a building there.
Either get off teh Jail trail at Bates and go up Bates, or take the Jail trail to the Panther Hollow trail (I can't begin to describe that, if you haven't been on it. There might be signs, I dunno) and up Neville or Joncaire to S bouquet.
Good luck
Mick