Hello Thumpertalk, I'm contemplating buying a gps for riding unmapped trails and need advice on which gps I should buy. I seem to lack the internal compass that most of you have , so when I inevitably get myself lost out in the trails i would like a gps that allows me to retrace or backtrack my route. What are some options that have this backtrack option? Do they set "breadcrumbs" automatically? Thank you.