TRAIL SUGGESTIONS:

Hikes from 2 to 6 hours in length
Mt Minsi at the Gap (loop hike: Hikes 1 and 3)
McDade Trail: Hialeah to Turn Farm (5 miles each way, climbs slowly but steadily northbound)
Pocono Environmental Education Center (PEEC) PA (a variety of trails open to all park visitors)

History Hikes and Strolls
McDade Trail I: Hialeah to Turn Farm
Lime Kilns near McDade Trail and Zion Church
McDade Trail II: Milford Beach to Pitman Orchard

(Fairly) Flat and Easy Trails
ϑ about 2 miles round-trip
ϑ little or gradual ascent; no scrambling
ϑ flat trail surface and fairly good footing

Most sections of McDade Trail
Toms Creek Trail
The Appalachian Trail from Totts Gap to the view of Mt. Tammany 

Wheelchair-Accessible Trails
The boardwalk trail at Dingmans Falls

Hikes in New Jersey