How do i convert a quad track to a route so i can follow it every time?

How do i convert a track in the bush to a route that i travel all the time? Ive tried in basecamp but it always makes straight lines to roads etc. Is there a way to convert the exact track to a route? Or is there an app i can download to convert the track to a route then send to my gps?

0245.BaseCamp.pdf