Here is a link to the GPS course file thru Ride With GPS.
To download the gpx file, go to export at the top right. You can then download a gpx or tcx file. At the bottom right of the page there are instructions for specific Garmin’s.
Here is a link to the course map: https://drive.google.com/open?id=1szvRxWmNzlJEDXPdRaqSF_0P-_zeXNmC&usp=sharing
The map is a google map which means you have to have a google account, its super easy to set one up. You don’t need to have a gmail account, you can use you normal email address, just takes 10 seconds. Here is the link.