I am in Baltimore, MD; does anyone know of any 2013 Gravel Grinder or Ultracross races/ events in the Mid-Atlantic (PA-MD-VA)?

I am only aware of the Iron Cross held in October at the Pine Grove Furnace State Park, PA: http://ironcrossrace.blogspot.com/

I am also looking for recommendations for similar type training routes in the 50K - 100K length within an 90 minute drive from Baltimore.