Shenandoah Mountain 100 is a 100 mile backcountry mountain bike race in Virginia's George Washington National forest on singletrack, doubletrack, fireroads with a bit of pavement. Early registration is $150 until March 2nd, 2013. Regular registration is $170 until April 13th, 2013. Late Registration is $190 until June 1st, 2013. Last minute registration after 9:00 PM June 1st is $210. Categories for Open Men, Open Women, Master Men 50+, Master Women 50+, Singlespeed Men, Singlespeed Women, Clydesdale, Tandem Team.