A 136 km circuit which hosted the I Circuit des Ardennes des Voiturettes on the 23rd June 1903. It was held the day after the Circuit des Ardennes, but on a circuit modified to include a section to Arlon. The red line on the map above shows the Bastogne circuit used by the main race.
On the 4th July 1905, the Circuit des Ardennes was held a 40.240km circuit based on Arlon, the track using the extension for the 1903 event with the linking road run in reverse. It held motorcycle and voiturette races.