One Lunger Snowmobile Race The Pinedale Snow Explorers Snowmobile Club hosted the 12th annual One Lunger snowmobile race in February. The vintage snow machines must be manufactured on or before 1973. can be no factory race sleds. Engines make must match the chassis, no jackshafts and the sled must race and finish with its hood. The engines can be modified extensively. Photo by Synve Mitchell. Click here for more pictures.