Soggy Bottom Boys Racing centered in SE Virginia hosts Rogains of various lengths. They use USGS maps. Here is their schedule.
Sat Nov 5 th, ’11: Fall Urban-O Meet with 60+ all newdesigned and tested Checkpoints
Feb 25, 2012: Third Annual 3, 6 & 12 hr Rogaine withall new courses, less urban city travel and over 70more rural CPs
April 2012: New 3-hr Paddle-O race with dozensof possible CPs (Teams or Soloists)
June 2012: Original Summer Solstice – 6-8hr Sprint and 18-hr overnight longcourse with many “unique” sections and surprises
You can visit their website for more details