At the bottom of your map, I'd just cross Rt 183 to stay on W. Leesport Rd., Then pick up Reber's Bridge Road, which probably has a good climb, but at other end of Reber's Bridge Road, actually at the bridge, you can jump on the Union Canal Trail, and again that will take you to SRT. Trails over by Blue Marsh are too rough for even a hybrid bike.
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BierHaus Bertolette Road Bike, built 2007
BierHaus SRT Trail Bike, built 2010
Fuji Mt. Pro - 2007