I recently did a hike where I "lost" the way back to the trailhead. The problem was the return route as shown on the map was totally wrong. The entrance to the trail section I was looking for was actually about 100m from where it actually was. It took us ages to find the actual trail head. We were in rugged terrain and 100m was a fair distance. A very concerning situation!
The thing was earlier that day we had actually walked up this trail and I would have left a track file on the watch of the exact path I took. I had finished and Saved that track. On the way back (by a different route) we were meant to meet up with the path that we had taken on the way out. We could not find it. If I could have loaded the track I had made earlier that day, I could have seen exactly where to go. I could not see any way to do this. We actually used the track a group member had recorded on her Suunto watch! If not for that we would have been in serious trouble.
I synced my watch with the phone and I uploaded my first track. No worries - it showed up on the phone ok. But I could not do anything with it. The map in Garmin Connect is pretty useless - not even OSM and shows virtually nothing. It also does not show your GPS location, so also fairly useless for what I wanted to do.
I don't see any way to export the Track/Activity from Garmin Connect either, which would have worked.
I have done hundreds of hikes with the Garmin -- this is the first time I have needed this feature.
On another note - I have since gone onto OpenStreetMap and fixed the erroneous trail. Who knows if that will ever translate into the Garmin maps? I hope so.