Take Roswell Rd. South to Dalrymple Rd and turn right. (If you don't know Dalrymple, Roswell Rd. is where Spaulding Dr. becomes Dalrymple Road.) Dalrymple Road becomes Riverside Drive, then makes a graceful curve to the left and begins to parallel the Chattahoochee River. At Johnson Ferry turn right. At the first light, turn right into the Johnson Ferry parking lot.
Take I-285 to exit 24, Riverside Road. At the end of the ramp, turn left if you were on I-285 East, right if you were on I-285 west. Travel 2.4 miles on Riverside Road. After a marked 15 mph curve to the left, you almost immediately come up to the light at Johnson Ferry Road. Turn left and cross the Chattahoochee River. At the next traffic light (for Columns Dr.), turn right into the Johnson Ferry CRNRA parking lot.
Johnson Ferry Trail
Johnson Ferry Trail maps and directions