the Suhretal and makes the valley again more than 2 km wide. But only 500 metres further north the valley gets even wider (almost 3 km), since the valley of the Mülibach joins now the Suhretal from the west, as well as nowadays the most frequented motorway in Switzerland, the A1. While the Mülibach becomes the Köllikerbach after traversing Kölliken in the west end of the valley, the Ürke passes Kölliken on its east side, both running further north and joining each other before Oberentfelden. The Suhre passes Ober-, Mittel-, and Untermuhen on their west sides, but now on the east side of the valley. The Suhre, after it underpasses the A1, it traverses Oberentfelden right in the middle of this larger village and also now in the middle of the valley, to be joined by the Ürke in Unterentfelden (406 m a.s.l.) just after Oberentfelden and runs now almost westwards to circumvent the Gönert hill (468 m a.s.l.). About after 2 km it runs through the middle of Suhr, turns again to the north, being joined by the Wyna from the right just before Buchs (AG). After underpassing one of the major Swiss railway lines (running between Bern/Basel/Olten and Zurich), the Suhr passes Aarau on its eastern end and joins the much larger Aare running east-north-east at 362 metres above sea level. Rivers of the canton of Lucerne Rivers of Aargau Rivers of Switzerland