Scrapheap Challenge Season 4 Episode 6 Snowmobile ( Air Date 2001-10-14 ) Genre Reality, Action & Adventure category. Overview "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.".