Fair Food Festival. Three amazing weekends, leading to the 128th annual Altamont Fair, beginning May 28th - 30th, June 25th - 27th, and July 16th - 18th. Each weekend hours are Friday 12 to 8 p.m., Saturday 11 a.m. to 8 p.m., Sunday 11 a.m. to 6 p.m. with free admission at Altamont Fairgrounds at the intersection of Rt 146 and Arlington St.