There are actually two Thumb Rock Picnic Areas, upper and lower. Both of them are located within a few steps of Peña Blanca Lake. Upper Thumb Rock is situated on a low hill overlooking this 49-...[more]
Upper Thumb Rock Picnic Area
Turn west off Interstate 19 approximately 8 miles north of Nogales at the Pea Blanca/Ruby Road (AZ Hwy 289) exit. Follow this road about 8.5 miles to Forest Road 39D in the Pea Blanca Recreation Area. Turn right (north) on this road and drive a short distance to the picnic area parking lot.
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