Dang I completely forgot about CrazyDuck's great info:
"South of San Marcos-
Canyon Lake is an option nothing special about it, engineered lake. Lots of cars in one end.
San Marcos
Single car-
When traveling in a single car we use this method.
We get everything ready at Joes Crab shack by the falls. Walk it down to the bank and then park the car across the street on university property (open on weekends.) Then we enter the water at the bank and play in the falls and cost down to the exit which is on the left side. You can exit at the University Park or float down to Veterans Park. Check attachment of San Marcos city parks. Veterans is very long concrete wall and this is a pretty short dive. When complete have someone walk back and drive the car down to Veterans Park.
Link
http://maps.yahoo.com/maps_result?a...ew=1&name=&qty=
Driving Direction-
Take a right on Bobcat Drive and then an immediate right on Jowers street. You will see a small sign pointing down the street saying city park. The road bends to the right and becomes Main St and that dead ends into the city park. The park is called city park or Jaycees city park.
Group
Other option for Groups- Have everyone meet at Rio Vista Park. Someone in the group needs to drive a truck (not a problem in Texas.) Then pile everyone into the truck bed and bus them up to Joes parking lot and let them walk down to the bank. Then the last person parks the truck across the street or someone (not diving) drives the truck back down to the park. Depending on the group the trip can take anywhere from 45minues to a 1-1/2.
Sidenote- make sure your fins are attached properly. Then come off some how in the current. Bring a goody bag and a trash bag. We collect all sorts of trash and goodies.
There is a set of stairs at Rio Vista park. Good place to start to let the divers see where they are getting out at."