offroad sprint tri's or du's

Do a google search for Off Road Triathlon. Also check out this Exterra site. Here is a link to their calendar races all over the country.

http://xterraplanet.com/races/race_schedule.cfm?name=race_schedule&year=2009&pointseries=1&state=&country=&nodefault=1&dates=1&mode=all

You can check http://www.xterraplanet.com and search by state for the '09 schedule. Just click on "races" at the top and "race schedule" at the left.

Also check http://www.goneriding.com/ , mostly mountain bike races but a couple tri's.

Ft. Yargo Offroad triathlon in Winder, GA

800m swim, 10 mile mtb, 5 mile trail run

really fun, low key race.

it was my first tri (last year)

ditto, I'll be there again.

Also, I believe Xterra is holding the SE Championships in B'ham again this year. 

I thought that most of the  trails were hard packed, but you did have sections were it was rooty/rocky/loose. You had some intense hills, too. Very steep dips that required some hard climbing. I had no bike fitness last year, so I had to jump off and push bike up some of these steep hills. Several places (long downhills) where you could really open it up and fly! The trails were very narrow in places, with a bunch of trees right on the edge of the trails. I also remember that closer to the end of the course there was some erosion that made riding pretty tough. One of the funnest bike rides i've ever done.

Here are a few more I ran across:

http://www.southernclassicmtb.org/

http://www.bikeride.com/

Bikereg.com

http://www.ultracycling.com/events/racecalendar.html

http://go.imba.com/site/PageNavigator/TeamIMBAEvents