Towards Doylestown

Credit: Jeff Bakely, see his cue sheets for a versions of this that starts directly from the Art Museum. Maps: SEPTA blue works great (all roads are on it, though a couple do not have the names written).
Get out to Ambler using your favorite method -- look to 5 Points Ride
    or QCW Ambler Ride, or try this: start out with the 5 Points ride,
    but when you get to Henry, just stay on it. Henry will merge with
    Ridge. R Joshua from Ridge, L Stenton, R Sheaff, L Morris, R
    Butler Pike into Ambler
you are going north on Butler Pike in Ambler
L N. Ridge Ave in Ambler
R Tennis Ave (I think this is a T junction)
X Bethlehem Pike
L Norristown Rd
R McKean Rd
X Rte 63 (Welsh Rd)
L Stongs La
R Cedar Hill Rd
L at T Horsham Rd
QR Chestnut La
L at T County Line Rd
QR Folly
R at T Bristol Rd
1st L Old New St (at least I think this is its name, 
  the cue sheet is crossed out here, might be New 2nd St)
L Lower State Rd (this is the farthest point out)
L Limekiln Pk
R Lower State Rd
R Rte 63 (Welsh Rd)
X Rte 309 (Bethlehem Pike)
can stop in plaza right after 309 to get some food at 
Fresh Fields grocery store or Subway, then continue on 63
1st L Evans Rd
turn R then L to stay on Evans
X Sumneytown Pk
L Gypsy Hill Rd
turn R then L to stay on Gypsy Hill
R at T Bluebell Penllyn Pk (unmarked last time I was there)
X Morris
X Skippack Pike
BL Stention Ave
Stenton merges R with Walton
BL Stenton again
R Narcissa at 5 pt intersection
marge R Butler Pk
L Flourtown
R Joshua Rd
L Germantown Pk
R Church La
Once you get to Ridge, there are several ways back. Here are my 2 faves:
Alternative 1 (the easy way down):
    X Ridge to Harts La
    R Barren Hill
    L River Rd (may not be marked) at bottom of hill
    go up little hill, go down hill; just after the railings 
    end is a small opening on the R to the bike path, go L on path
Alternative 2 (absolutely beautiful road, but have to go on Ridge a bit):
    L Ridge
    R Manor at stop light (right nest to golf course)
    go down big hill
    at bottom of big hill, just before you get to RR station, 
    you go under a little bridge. The bike path goes over this bridge.
    There's a tiny path to your R just after you go under the bridge.
    take this path up to the bike path
take bike path back to Philly (see "Bike Path to Valley Forge" cue)