.fit files

According to this page, you can import FIT to Garmin Training Center or Garmin Connect, then export as TXC. You can use GPSBabel to convert TXC to GPX.

Apologies for such a late response... the latest version (1.4.4) of gpsbabel reads garmin fit files from an Edge 800 as both input (and output). It loses some information (something I think may be resolved) like date/time (taking 'now' instead of trace metadata... but I don't know if that's fit or just gpsbabel), but the gps trace/route IS intact.

e.g. an example import

gpsbabel -i garmin_fit -f /mnt/GARMIN/Garmin/Activities/activity20120918.fit -o gpx -F ~/tmp/output.gpx

Hope that helps!

Maybe Routeconverter can handle and convert that fit files.

I'm posting this here because Google likes this and I thought it might be useful if your running linux and lazy like me and want a one-click solution. This finds fit files in anything mounted called "garmin" and puts gpx files with the same name into a folder in your home folder called "Tracks" Thanks to spaceyjase for the gpsbabel syntax.

#!/bin/bash
# Convert any new files to GPX from the garmin fit format.
# existing files will not be overwritten
# FROM is the name of the mount point for the garmin, my garmin is called "GARMIN" and I called the sd card "garmin-map" so this finds both if they're mounted with automount
FROM=garmin
TO=~/Tracks/

FROMPATH=`mount | awk '{print $3};' | grep -i $FROM`
GARMINEXT=".fit"
TOEXT=".gpx"
GPSBABEL="gpsbabel"

# Check if gps babel exists
hash ${GPSBABEL} 2>/dev/null || { 
    echo >&2 "I require ${GPSBABEL} but it's not installed.  Aborting."
    exit 2
}

# there may be more than one matching path
for FROM in ${FROMPATH} ; do
# check if the path is valid
    if [ -d "${FROM}" ]; then
        # create the destination if it doesnt exist
        if [ ! -d "$TO" ]; then
            echo "Creating $TO"
            mkdir "$TO"
        fi
        echo "${FROM} => ${TO}"

        # find valid folders that we can use
        # we cant process all .fit files
        for SEARCHPATH in `find ${FROM} -type d -iname Activities -o -iname Courses` ; do
            # find all the fit files in the folder
            for INFILE in ${SEARCHPATH}/*${GARMINEXT} ; do
                if [ -f "${INFILE}" ]; then
                    # work out the destination file name abc.fit => abc.gpx
                    TOFILE=`basename "${INFILE}" | sed s/$GARMINEXT/$TOEXT/`

                    # only do the conversion if the destion doesn't exist
                    if [ ! -f "${TO}${TOFILE}" ]; then
                        echo "Converting `basename "$INFILE"` to $TOFILE..."
                        ${GPSBABEL} -i garmin_fit -f "${INFILE}" -o gpx -F "${TO}/${TOFILE}" || {
                            echo "Failed to convert ${INFILE}"
                        }
                    else
                        echo "${TO}${TOFILE} alread exists."
                    fi
                fi
            done
        done
    else
        echo "$FROMPATH does not exist."
        exit 1;
    fi
done

Current versions of GARMIN connect can export .gpx files directly.