Thats right , you have to have a routable map. But when u do get a routable map it will only take u as close to the cache as a road will get u, u will have to then go to setup ,routing, guidance method, and change from on road to off road. That will let u get the crow flies route. What we do is set automotive mode for on road and set geocaching mode for off road, we use auto mode till we get there then just switch over to geocaching mode. Hope u like your Colorado we just love ours.