Sign Up to Volunteer at The Carbondale Mountain Fair Volunteering is the heart and soul of the Carbondale Mountain Fair, taking place July 28, 29, & 30. Every year over 300 community members help out with everything from the Green Team to Peace Patrol. It is a great way to meet new people and be part of a 46-year-old festivity that brings the people of Carbondale and its surrounding areas today! When you volunteer more then 4 hours you can receive a free Mountain Fair Volunteer t-shirt! Volunteers can sign up at carbondalearts.com .