Here are some of the Denver area brew fests that I know about.  Others can be found here.

Beer Camp Across America (Rocky Mountain edition) to take place on Friday, July 25 2014.  Tickets are $74.45 and up for 110 or so brewers.

Summer Brew Fest. Friday – Saturday, July 25-26, 2014.  Tickets are $32.64 and up. Looks like about 60 brewers are involved in this one.

Wobtoberfest to take place on August 15th. Tickets are $37.22 and up.

The big daddy is the Great American Beer Festival to take place October 2-4, 2014.  Ticket prices for members start at $75.  Tickets go on sale for members on July 29th and the 30th to the general public.  This is a good reason for me to join the AHA.