A variety of snowmachines from The Old Motor

 What some used to do with their Harleys in the winter

 Cat tracked and hydraulic rammed with solid front tires.

 Wow, land train... I can't recall seeing one before. Very cool

either a homemade snow machine from car parts, or a conversion kit...  in front of the woman on the right is a door I think, and behind her the body seems to have some sheet metal going up the side from the frame

found on http://theoldmotor.com/