Using TOPO! North America users might export their TPX projects to GPS Exchange format (*.gpx). It is done by highlighting the track you wish to convert and hitting the export button which will prompt a saving dialog box.
Convert Topo North America project to GPS eXchange format.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert tpx to gpx on Windows
Topo North America is confident planning and navigation software. Scout your destination as if you were there, with up-to-date terrain, trail, and road detail. Fly over realistic 3-D. Import aerial imagery. Route your travels over roads and trails.
Convert from tpx file
to gpx file
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.