Take the Amado Road exit on Interstate 19, head west to Arivaca. Turn south out of Arivaca on FR 216 about a mile then east on FR 39 about 5 miles to a road that turns left (east) to the lake. Via the Ruby Road: take Interstate 19 north from Nogales 8 miles to the AZ 289/Ruby Road exit, head west 10 miles on this paved road past Pe??a Blanca Lake and continue on FR 39 (unpaved) for 26 miles to the primitive road (FR 4130) that turns right (east) to the lake.