diff --git a/js/gpx.js b/js/gpx.js
index e797ef1..9770b9f 100644
--- a/js/gpx.js
+++ b/js/gpx.js
@@ -162,6 +162,7 @@
     }).addTo(map)
 }
 
+// TODO this list should be built server-side at startup
 const ta = [
     this.addGPX(map, '../tracks/turin_09122022.gpx', 'red'),
     this.addGPX(map, '../tracks/biella_27122022.gpx', 'blue'),
diff --git a/python/tracklist.py b/python/tracklist.py
new file mode 100644
index 0000000..6408cd0
--- /dev/null
+++ b/python/tracklist.py
@@ -0,0 +1,24 @@
+#!/usr/bin/python3
+
+# load GPX tracks from a provided directory and output a json file listing all of them
+
+import os
+import glob
+import json
+import argparse
+
+# setup CLI parsing
+parser = argparse.ArgumentParser(
+    prog='GPX track list builder',
+    description='load GPX tracks from a provided directory and output a json file listing all of them, paths are relative to the calling directory',
+    epilog='')
+
+parser.add_argument('-d', '--dir')
+args = parser.parse_args()
+
+# list all files in args.dir
+tracks = {
+    "tracklist": glob.glob(f"{args.dir}/*.gpx", recursive=True)
+    }
+
+print(json.dumps(tracks))