This. The Garmin maps don't have topographical data, (the topo maps show contour lines but the Garmin can't 'read' them) so they will occasionally take you up a 30% ramp to avoid an extra 200m of road.
@Brommers started
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This. The Garmin maps don't have topographical data, (the topo maps show contour lines but the Garmin can't 'read' them) so they will occasionally take you up a 30% ramp to avoid an extra 200m of road.