The Boulder Municipal Airport (BDU) now officially offers unleaded aviation fuel. The City of Boulder invites members of the public to a celebratory event on July 10 at 9 a.m. at the Boulder Municipal Airport Terminal, located at 3327 Airport Road, Boulder, CO 80301. Parking is free. The event will include brief remarks from city staff, light refreshments, a ceremonial ribbon cutting, and a first fueling of the new fuel, called UL94.