When driving to Enchanted Rock from San Antonio, you should go out on I-10 and take US Hwy 87 to Fredericksburg. From there, take FM 965 north to Enchanted Rock (it'll be on the left). To make sure you don't get lost, you might want to bring along a compass. Here's my compass, I made it out of Silly Putty. I swear, it works just as well as any other compass--
--Well... okay, so putty compasses don't always last as long as they should. And yeah, they don't really help you keep track of cardinal directions. There's no doubt in my mind, though, that compasses made of Silly Putty are more fun than normal ones.
Wanna know what happens when you lose your way? If you take a turn too early, you might end up on a road like the one we wound up on when we turned too early.
Like I said, you have to be careful not to turn too early, or else you might come across some trucks with explosives in them, and I don't know about you, but in my experience, trucks with explosives in them are bad news.