BOULDER, Colo. — A woman who was a good 15-20 years past the usual field-storming demographic was out there on the grass at Folsom Field Saturday, recording video on her phone. Euphoria surged around her, as younger trespassers ran and jumped and howled. Music, mayhem and marijuana wafted through the thin air.The woman spied another older field stormer. She asked with a laugh, “What are we doing out here?” Riding the wave, ma’am. Riding the wave of the biggest, freshest, funnest party in ...