Is anyone familiar with the adventure cycling texas hill country loop? I'm going to do it this fall and trying to figure out a place to leave my car. My best idea so far was the amtrak/bus station in San Marcos but I called and they said I can't leave it there without a train or bus ticket. Maybe one of the state parks on the route? I know the airport is an option, too, I'm just looking for something free.
Thanks

I have not done that route. But if I planned to, I would call ACA and ask them what they suggest. Most tour groups try to have answers for common questions from their customers.

Try an airport? Even the small one near here will allow long term parking if you ask and park in the least used part.