To test out Paddle Mate I have been using my own routes, some tester uploads, and a selection of
routes I have found online.
The best source online I have found that I have pulled several routes from is the site GPSies: Tracks for Vagabonds.
What I like about GPSies is that I can narrow down my routes to just "On water" meaning I can find canoe and kayaking routes.
If you need to find some routes for your GPS enabled app then start at GPSies.