GPX track on a Garmin. Sometimes the routes have too many waypoints and the routes stops being marked out.
This. If you save it as a route, bikehike has the option to reduce the track points (in options, if I remember right). I can’t remember how many you’re allowed…if you keep it under 300 you should be OK. My first time using mine, I was 30 miles into my first century ride, in a place I’d never ridden before, when the track just ended! Always check the full route is there before I head out now!
Or save as track and don’t worry about it. (Only difference I’ve noticed, is it doesn’t beep when you;re on course)
Save it into the GPX folder on your Garmin.