WILSALL – It’s 9:30 p.m on Friday, July 29, and from Shields Valley Road the Crazy Mountains are a dark mass against fading light. “Look,” I say, directing the gaze of the two others I’m in the Toyota Land Cruiser FJ60 with toward a string of glowing headlamps twinkling as runners snake their way across the range. Behind them, a flash of dry lightning illuminates the sky followed by an ominous rumble of thunder.