Haleakala ATV Tours. Haleakala ATV Tours explore the mountainside in their own way: propelled through the forest on 350 cc, four-wheel-drive, Honda Rancher all-terrain vehicles. The adventures begin at Haleakala Ranch and rev right up to the pristine Waikamoi rain-forest preserve. Kids under 15 ride alongside in the exciting Argo Conquest, an eight-wheel amphibious vehicle. Two-hour trips go for $90, and 3 1/2-hour trips are $135. Haleakala ATV Tours is now offering combination ATV and Zipline tours with Skyline Eco Adventures on Sunday for $177. 808/661-0288 or 877/661-0288. www.atvmaui.com.