Meet the J5 Robot platform: a powerful amphibious rover with tracks that can handle rough terrain. It has a max speed of 18 km/h and can climb slopes up to 45 degrees. It can operate in temperatures from -20 to 40C. The ATV comes with 24″ turf tires or 12″ wide quad track system.
As this video shows, the J5 robot is powerful enough to haul a snowboarder. More info is available here.