Sur Chico's best craft-beer destination, El Growler is a collaboration between an Oregonian brewer and his Chilean partner. There are 15 taps, more or less split evenly between house-brewed IPAs, red ales, stouts, porters and experimental brews (and always one cider), along with invitees from the region and occasionally the USA. Weather permitting, the outdoor patio is always packed.
Great and rarely seen bar grub (fish tacos, deliciously messy reubens, fish and chips, and interesting veg choices like polenta and garbanzo sandwiches) means you can call it a night here, and you aren't likely to find a better IPA for kilometers. These guys grow hops right on the patio!