http://wildwest4wd.com/flyer.htm

has most of the details. We will be updating it with Trail information in the next month. This is going to be a fun event. There are trails for stock rigs to fully built buggies. Most of the trails we will be driving on or trails that have not been exposed to people other than locals. If you come you won't see anything you've seen in any magazine before. Mountain Home is actually high desert. Our trails were formed by Snake River Basalt (lava rock) and depending upon the deposit can vary greatly.

There might be some availability of some of the older Owyhee Trails earlier in the week if you are thinking of coming out for a longer duration. http://www.pirate4x4.com/forum/showthread.php?t=518632