Report 63832: Motorist sighting in Harriman State Park not far from Appalachian Trail

My 2 best friends and I would take night rides into Harriman State Park late at night to see what we can spot at night, i.e. bear, deer, fox, etc. Its a beautiful park and the solitude at night in the off season makes the park special. Creepy too! As we were driving the very windy Garden Valley Rd we had to go slow due to the turns and danger of the steep drop offs on the road side. I was a front seat passenger, high beams on. Driving no more the 25-30 mph.  At the max viability of the headlight I see the outline of a large upright being running across in front of us and leaping the bank on the high side of the road, instantly disappearing into rhododendron thickets. I freaked out upon first visual and alerted my friends. The driver hit the breaks, windows open we could hear thrashing of the ground from running  but the sighting was over. My friend the driver did see movement but couldn't make out what I made out. We both agreed on the sound of it fleeing up the steep slope. What solidified my two friends belief in what I saw was the look of fright and amazement on my face. Features of the upright being I saw were large thick long hair covered legs, human like strides, and tall enough that the headlights did not focus above its midsection, so I couldn't make out facial features.  We were not drinking or doing any illegal substances. I would love to be able to speak to the park worker who had a sighting in the same location. I am so excited to finally be able to tell this encounter.