The White Trail at Deer Lakes Park, Tarentum, PA, is a moderate 7.9 mile out-and-back hike that starts on the west side of the park and follows the southern and eastern perimeter to end at the Orange Loop Trail.
It's 3.75 - 3.9 miles one-way depending on if you continue hiking toward Kurn rd on the eastern side. You can create an alternative route by hiking from the Orange Loop down Kurn road to the parking lot for ~5.5 miles instead of 7.9.
While this is one of the longer trails at Deer Lakes Park, it's likely one of the better trails there. The trail weaves in and out of different types of forests and cuts across a secluded field in the southern section of the park. You'll likely see deer and other animals on this trail since it's very lightly trafficked.