A few of my favorites that will be attending include: FATE, Great Divide, Black Bottle, and Odell (among many others).
Tickets are $40 when purchased in advance at http://www.imbibe-events.com/fresh-hop. Ticket includes unlimited beer tastings and snacks while they last. Ticket price will increase at the door if available. A portion of proceeds from ticket sales benefits the Colorado Brewers Guild.