Endurance Riding...how to?

How would you find a good endurance riding instructor? Do you know of any? (especially in the San Antonio area?) Are there other ways you have learned endurance riding?
I have never done it but I would really love to do it. I just don't know where and how to start.
Thanks!

I know of an endurance rider/instructor/trainer. But she's in PA.
She has a bunch of gaited breeds that she takes on competitions. I think it's really cool.

I would see if there's an endurance club or something and ask them.

ALL endurance rides needs Volunteers. Go volunter for a ride in your area. Those folks will take you under their wing. At least in my area, I have found endurance and CTR riders will always very very helpful for newbys.

Check the calendar on AERC website for ride dates

Just about everything you need to know is here at AERC.org - their mentor page is under the "Education" drop down menu...there are several listed for Texas.

Thanks guys :) I checked out the sources and I think I'll get all the info I'll want :) Thanks again!