The 21 Essential Restaurants in Boulder, Colorado

"This late-night, by-the-slice student staple launched its first shop on the Hill in 2000 and hasn’t slowed since; it now has locations across the Front Range, including one on 30th Street across from off-campus freshman housing Will Vill (aka Williams Village) and another just up 28th. Order a slice and dip it in the restaurant’s famed spicy ranch dressing, and you’ll understand why a stampede of hungry partygoers crashes over the shop every weekend, even in the winter. Don’t want to wait in line outside in the cold? Cosmo’s delivers until 2 a.m." - Rebecca Treon, Josie Sexton, Ruth Tobias, Nisa Sedaghat