Polar’s slowly but surely opening up their ecosystem. First it was Strava, then GoPro, and now they’ll bring in .GPX and .TCX files from 3rd party services and upload the routes to the V800 sports watch and V650 cycling computer. From there, either device can provide route guidance to keep you on your way.
You’ll need to import the files into Polar Flow, then sync the device to move it onto the computer or watch. File size is capped at 25mb, which should be plenty. Instructions are here, and the video below shows just how easy it is…