I was viewing a trail in Basecamp using the 24K US West (from DVD) (Fresno Dome, eg, in CA). Fine.
I have the same map installed on my Oregon 600, but the same trail does NOT appear. Whaa?
I am using the same map on both, with no overlays or anything else (that I'm aware of). Max resolution, and same problem at any zoom. And note NO trail shows; but in Basecamp it's a routable trail.