The boys at Gettysburg Bicycles posted the map for the spring race. It looks pretty tough -- if you've ever done the exert race down there, it is now that course, plus another 25 mile loop shoved in the middle of it right after the Dead Woman Hollow climb (big long fire road climb about 1/2 way in). OUCH! 50 miles, and it looks like a lot of singletrack.
Check it out here:
http://www.gettysburgbmx.com/michaux/images/maps/maximus/2007/200750mile...