http://www.ushpa.aero/calendar.asp?theDate=8%2F1%2F2009

http://ozreport.com/calendar.php

One of the two US Nationals will be held in Big Spring, Texas this year (the other is the King Mountain Nationals in Arco, Idaho). I conveniently see these two events as the Mountain Nationals (open distance) and the Flatland Nationals (Race to Goal).

The Big Spring US Nationals will be held August 9th through 15th. Registration information can be found at the Oz Report Competition calendar linked to above. It is supposed to be open for registration the first of February.