A Bunch of Creeks and a River

Credit: this one's mostly mine (picked the last bit in Fairmount Park from a QCW ride). Maps: ADC is by far the best here. The SETPA blue covers the entire area, but not in sufficient detail. You could combine the SEPTA red map with Montgomery & Delaware County maps.

start at Art Museum
go to West River Dr.
L Sweet Briar
R at T Lansdowne
1st R Concourse Dr
past Memorial Hall
X Belmont
thru' little traffic circle around white statues
out of park on 52nd St
R Parkside
L Bryn Mawr at 2nd light
L Wynnefield at Thrift Drug
L Woodbine (2nd of 2 lights close together)
R 59th 
X City Ave to Raytham
L Latches La
R at T Merion
L Bowman at a light
R Wynnefield at a light
L Shortridge ***East Br. Indian Creek***
R at T Remington
L at T Powder Mill
R at T Manoa
1st R Karakung ***Cobbs Cr***
BL at T Havorford (big road)
L Eagle (big road)
R Hirst Terr just before N Darby Rd 
BR tso Hirst
BL Huntington
L at T Golf View
X Darby Rd
R at T Ellis
L Ellis just before R curve (at golf course)
R at T Lawrence
1st R Darby Cr Rd ***Darby Cr***
L Marple after loop at end of road
L at T Darby Rd
R Radnor Rd becomes Mill
L Brwn Mawr -- short green light!
1st R Ithan Ave ***Ithan Cr***
L Mill Rd
L at T Conestoga (big road)
X 476, pass Radnor-Chester Rd
go under little RR bridge
next R Brookside
R at T Orchard Way
R at T St Davids Way bec Chamounix
X Lancaster, X RR
R St Davids
R Glen Mary at DNE
L tso Glen Mary
L at T King of Prussia
R Gulph Cr Rd ***Gulph Cr***
R County Line Rd go up huge hill
R 320 Spring Mill to get to food & water stop
(convenience store just before Lancaster Ave)
go back along 320
R County Line
L at T Ithan
1st R Curwen
X Montgomery to Ithan
R Old Gulph at light
L Old Gulph at light
X Morris
L Black road at top of hill
R Dove Lake ***Mill Cr***
R at T Old Gulph Rd
BL Mill Cr Rd ***Mill Cr again***
L Mill Cr after intersection with 23
R at T River Rd *** Schuylkill R***
R Hollow Rd when River Rd ends
L Hagys Ford at light
X 23 (traffic light)
S Old Gulph Rd
L Brwn Mawr at light
jog L at Bala to stay on Brwn Mawr
jog R at next intersection
L Wynnefield (at Thrift Drug)
L at top of hill (Georges Hill, um, I think)
X Belmont, up little hill
L Chamounix, go down hill
R Ford (at bottom of hill)
R at T, cross Strawberry Mansion Bridge
BR after bridge (don't think you can go left) 
  go up little hill, road curves right
R when you come to a T (ie, don't exit park)
L at intersection with Indian statue on right
  (this gets you onto Reservoir, may not be marked)
X Diamond/Randolph
BL at the fork (R branch is Fountain Green, 
  L branch is Reservoir, may not be marked)
follow the road out of the park
R 33rd St
X Girard to Poplar
L Poplar
R 28th
L at T PA Ave
R 25th back to Art Museum