Sync with adventures.garmin.com
I have an Oregon 600 series - the best GPS for MTB with replaceable batteries. It also has Bluetooth capabilities but there is no way to use this wireless feature to sync with Strava.
If Strava could upload or download tracks and photos to/from adventures.garmin.com or directly between iOS Strava and Garmin Apps it would be a valuable workaround to move the files.
I would help to make the Garmin Basecamp iOS App really useful for Garmin Oregon 600 series owners and Strava users. Basecamp mobile is the only app Garmin provide to move wirelessly files between Oregon 600 series and iOS devices.