Turn off US Rt 460 at Pembroke VA (20 miles from Blacksburg VA, home of VA Tech) onto Cascade Drive. Follow Cascade Drive to the end, 4 miles to the parking area.
This is a beautiful hike in any season. It is 2 miles, uphill, one-way, but there are two trails. One leads along the side of Stony Creek all the way up. The scenery is great all the way and the falls is definitely worth the hike. Bring water or bottles to fill at the bottom before you start. Worth every step.