Does the route show on the map? I have had distance recorded from my foot pod but no GPS data resulting in no route or elevation. I had to restart my watch and then it was fine after that but that run just didn't record the GPS info.
Does your watch show elevation gain (or loss) on the activity history? Try saving the activity to a GPX file, view it in notepad. You should be able to pick out elevation information if it is there.
