The Jackson Trail at Rothrock State Forest in State College, Pennsylvania is a moderate 3 mile one-way hike that leads to the Mid State trail atop a mountain ridge. This section of GPS data goes ~2.2 miles (one way), hence 4.4 out-and-back.
Camping is allowed within 25 feet off of the trail and dogs are allowed. Great views, but the rocks on the trail make this hike a challenge. Trekking poles may come in handy here.