From GA 400 southbound take Abernathy exit. Turn right on Abernathy. Travel about two miles on Abernathy to Johnsons Ferry Rd. Turn right onto Johnson's Ferry. Go past the river and turn left onto Paper Mill road, the second intersection after the river. Go about two miles and turn left into the parking lot marked by the brown Chatahoochee River Recreation Area signs.
Review: Great trails. Smooth trails, rolling hills, for beginning trail runners. Technical trails, with steeper climbs, for more advanced runners. Sunday I ran 11 miles there and only did about 2 miles on the same trail (on the way back to my car). You could easily get in about 14-16 miles there without running the same trail twice. BTW - My run on Sunday showed 1,230 feet of total climb (and of course, the same amount of descent).