Open source mapping for Garmin GPS. What do you use?

[Blue Hills]

Am pretty sure they will be - just check online.

I do know that many long distance cycle routes in Italy are very imperfectly signed on the ground, but the routes can clearly be seen on OSM.

 

[gom]

There is lots of useful info on the OSM wiki above, & fortunately you don’t have to worry about creating a Garmin-compatible map yourself. There are lots of prebuilt ones which can be found via the wiki. Just download and copy the .img file of your choice.

When I got my eTrex 30+ I tried many of them for look and feel. For me the best is http://www.openfietsmap.nl/. I use for Britain & France.

The significant differences for me were the way the various colours showed up. On my old etrex Vista I used https://www.freizeitkarte-osm.de/, but on the 30 the colours weren’t good