Lake Flaten, Stockholm, Sodermanland, Sweden
Circuit Type: Frozen Lake
Extension: 3 Km
Lap Record: 1:28.800
Year: 1937
Driver: Helmer Carlsson
Car: Alfa Romeo 8C-2300 Monza
Speed: 121,6 Km/h
| Year | Official Name | Date | Winning Driver | Constructor | Laps | Time | Formula |
|---|---|---|---|---|---|---|---|
| 1937 | I Flatenloppet | February 14 |  Eugen Bjørnstad |
 Alfa Romeo |
15 |
00:22:54.000 | GP |