The North American Hillclimb Association finished round one of the 2007 RacerX/American Suzuki Pro Hillclimb Series in Tracy, California in early April with defending NAHA champion Harold "The Gasser" Waddell from Omaha, Nebraska winning both the 0-700 and Open classes. The series moves to Riverside, California for round two, at Glen Helen Raceway, on May 6th. Round four will be at the Buffalo Chip Campground August 8th and 9th during the 2007 Sturgis Rally on a brand new hill next to the Chip. Look for the best riders from all over the country and some of the most extreme bikes to put on an impressive show this year at the world famous Buffalo Chip Campground.