For some reason, ogr2ogr doesn't handle raw gpx data well, and for some reason togeojson doesn't convert GPX waypoints at all. So, the solution I've come up with is to use both tools, and then hand-fix any errors generated.
NOTE: Converting KML to geojson is more reliable than converting GPX to geojson using this tool. With KML, you'll get waypoints and tracks, instead of just tracks.
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Install togeojson node module:
npm install -g togeojson -
Open up target GPX or KML file and run the following in the command line:
togeojson file.gpx > file.geojson
You should get a geojson file with just your tracks in it. Waypoints get deleted.
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Install ogr2ogr:
sudo port install gdal
If you have postgres.app installed, make sure you remove it from the /Applications folder, otherwise you will get several "image library not found" errors that will prevent it's use.
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Modify your raw gpx data so that it only includes the waypoints, not the tracks.
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In terminal, fire off this command:
ogr2ogr -skipfailures -f GeoJson target.geojson source-with-no-tracks.gpx -
Remove the "crs" property from the resulting geojson. It causes leaflet to throw a "unsupported projection" error.
$ cd project/directory
$ python -m SimpleHTTPServer