In the few short years since its inaugural weekend, Outside Lands has become a signature San Francisco event. Three days of dancing to dozens of bands, squeezing into the House by Heineken to revel in some sweet AC and ogling A-list comics will be punctuated by drinking and dining experiences that put traditional festival food to shame. Headliners Mumford & Sons, The Black Keys and Elton John will close out each days’ festivities, with acts as varied as St. Vincent, Kendrick Lamar and Billy Idol rocking the eucalyptus from four stages. Do not forget to wear layers, and prepare to get dusty. It’s going to be a long weekend.