The GPX 1.1 schema was released on August 9, 2004. GPX has been the de-facto XML standard for lightweight interchange of GPS data since the initial GPX 1.0 release in 2002. GPX is being used by hundreds of software programs and Web services for GPS data exchange, mapping, and geocaching.

source: https://www.topografix.com/gpx.asp

Just 2 years after the introduction of GPX 1.0 version 1.1 was already released. There has never been a new version ever since. It is safe to assume version 1.0 is obsolete if you use navigation software and hardware not older than 2005.

@Evert-Kuiken said in Route from MRA to Garmin zumo 350:

So no use telling me to convert the track to a route in the Garmin...

So it's no use telling you what you can do best. 🙂

There must be a way to get what I want without using BaseCamp?

Unfortunately, exporting and use of MRA routes works best with the Garmin XT. With other types the miner works well and it is recommended to use a track.