Raab, River, Styria, south-western tributary of River Danube, 265 km long (110 km on Austrian territory). Has its source near Osser Mountain (alt. 1,548 m) in central Styria, flows through the Passail basin (alt. 653 m), breaks through the Raab gorge below Arzberg (alt. 579 m) and flows into the East-Styrian hill country. It passes over a short distance through southern Burgenland, then flows into Hungary (Hungarian name: Rába) east of Mogersdorf (alt. 228 m). Near Györ (Hungary) it flows into one of the arms of the River Danube. Its tributaries are: Weizbach, Lafnitz,
ou.encyclop.p/p470858.htm>Pinka (from the north), Rabnitz (from the west), Güns (from north-west). Only the water of its upper course is of good quality, its average rate of flow at the Feldbach measuring point is 6.1 m3/sec. Towns and villages along the River Raab on Austrian territory: St. Ruprecht an der Raab (alt. 388 m), Gleisdorf (alt. 362 m), Feldbach (alt. 282 m), Fehring (alt. 272 m) and Jennersdorf (Burgenland, alt. 242 m). The Graz - Jennersdorf - Szentgotthárd (Hungary) railway line starts in Gleisdorf and runs through the Raab Valley.