3 Sisters refer to several of the twisty roads around Leakey. Google it and you'll get a map. Maybe we could all meet in Leakey that day and venture out from there.
The Rim is a shopping Center off I-10 and 1604 (San Antonio). I have never been, but I understand there is a Lowes there that allows Car Nuts to park and tell stories in their parking lot. Our old location was shut down due to fast driving and too many 'burn-outs'!