One of my favorite hikes in PA is to do a sunrise hike from the Hamburg Reservoir. Typically we hike up a road for the sunrise, but you can take multiple routes after that, including the Appalacian Trail.
It's a 72 minute ride for me which means getting up extra early. The best times of year to do the hike is 1) Late October, 2) in late December - early January, and then again right after the clocks change in March - 7:30 AM, 7:23 AM, and 7:14 AM respectively.