Instructions:
1. Select a trail from the dropdown — its track appears on the map as an orange dashed line
2. Optionally expand Corridor Width to change the search radius (default: 5 km)
3. Click on the map to set the Start point
4. Click again to set the End point
5. The route will be calculated and displayed automatically, with a suggested name you can edit
6. Click Download GPX to save the route for Strava, Komoot, Suunto, Garmin, or similar