Its the "Great American Championship Motorcycle Hill Climb" in Billing (Montana).<br /><br />Every year in august it is the longest running hill to this day, started in the 1940s.<br /><br /><br /><img src="http://ll.broadbandsports.com/images/26933_thumb.jpg" alt="Dirt Bike Hill Climb" title="Dirt Bike Hill Climb" width="150" height="90" alt="Dirt Bike Hill Climb"/>
