I just got a Garmin etrex and promptly took it for a hike. I can get the path and the trackpoints into QGIS with no issue. However, I cannot figure out how to get the distance between the trackpoints. I've played with the CRS and the file formats (converting to .shp for example).
When I go into the attribute table and attempt to calculate a new field using $length, all I get are NULL values.