A 3.735 km motorcycle circuit which was used 1937-1938. It uniquely had a circa 500m section which was completely off-road, and this is the darker line above, with the route estimated rather than known. World War II then interrupted things.
Racing returned in 1947, with the circuit shortened to 2.440 km with the removal of the offroad section. This was used through to 1953.
A 3.175 km street circuit was used for motorcycle races from 1955-56 and 1963-64.