Family Friendly: Kids could ride the road heading west to Frosty Gap Trail, which is mostly downhill, but then they would have to climb out. Some could also ride the trail - there are only a couple of harder sections.
Go up Dogway Road, off of Hwy 39. Park at the area with two metal gates. West is Frosty Gap Road, which turns to singletrack after four miles, south is Dogway Road, which leads down to the Cranberry River.
To reach this trail, you'll need to head east and tackle a short climb up the Kennison Mountain Trail
, and you'll eventually get to an intersection with the Frosty Gap Trail.
The road is a mellow ride, and though rolling, it's mostly downhill. If you're connecting this to other trails, or even if you're just creating an out-and-back there is some required climbing. The shortest loop is to go sharp left on Pocahontas Trail #263
(sign points away from you) then a sharp right on Eagle Camp Trail #259