Bike path cycling route

When I cycle, I normally follow 1 bike path, however this bike path has gotten boring and I would like to cycle a different route along a different bike path. However when I try to make a route with the Garmin Connect app courses feature I can't actually pick a filter to only cycle bike paths. The only options are, free hand drawing, following popular routes, and follow roads. I do not want to select any of these as they follow busy roads. Does anyone have any tips or help? Any help is appreciated!