The Seneca Trail at Two Mile Run County Park in Franklin, Pennsylvania is an easy 0.5 mile one-way trail that runs along the eastern shore of Justus Lake.
The trailhead can be found in the northwest corner of the main parking lot at the end of Beach Rd at the park. Look between the Beachside shelter and Lakeside shelter to find it. Hike north for about a quarter mile before you reach a small lookout point along the shore of Justus Lake next to a paved road.
Continue north along the paved road for a hundred feet or so to where the road turns toward Beach Rd - look for pink blazes and a small trail with a wooden bridge, as this is the continuation of the Seneca Trail.
Follow the trail all the way until you reach what's seemingly a dead-end. Just by the dead end is the Roadside Trail, which you can use to hike back for a different route.
Dogs and biking are both allowed on this trail.
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