I understand that downloads for the northern routes are not available for RideWithGPS.
Actually, the turn waypoints for these routes are available as a gpx track. They are rough and do not exactly follow the road. If you are member, you can also download the service waypoints. Both sets of files are available here:
That being said, by early spring 2017 we hope to have the enhanced version of the data for the Northern Tier, Lake Erie Connector and North Lakes routes available for sale. You can learn more on our Digital Data for Devices page.
Have a great tour!