1. Go to http://www.mapmyrun.com
2. Login with your personal MapMyRun account.
3. Go back to the previous "Running / Roller Skiing Routes" page and click on "MapMyRun route" below the route you want to add.
4. Click on the "Actions" button. Then click on "Send to phone".
5. You will recieve an email with a link that will add the route to your MapMyRun app.