The challenge is to build a one-man snowmobile. The test course, in the Mammoth Mountains, northern California, is circular with a 300-metre diameter. Each team has 10 minutes; the winner is the team whose snowmobile covers the most ground. In the event of breakdown, they'll be allowed to do repairs and restart twice.
click here to see where to watch or .
Ready to Watch Scrapheap Challenge, Season 4, Episode 6?