back roads maps

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I'm new to GPS devices for cars, and am sold on the tomtom product even though I haven't bought one yet. I'm old-school enough that I usually just rely on paper maps. One thing I can't get very easily anymore is a recreational atlas for British Columbia. They aren't updated very frequently anyway, and it was recently suggested that GPS maps are available showing back-roads in BC. Is there such a map available for any of the tomtom devices?