Garmin etrex 10 Manual page 17

The following steps describe this process:

Once you are satisfied with your newly drawn waypoints/routes, connect your GPS unit to your
computer using the process outlined in
GPS

Within LISTmap, select 'Export Markup to KML, CSV, SHP or GPX'.

Choose the GPX format from the dropdown list under the File Format option,
Using your Garmin etrex® 10 GPS
Topic 4: Transferring data between a computer and the
Page 17