Erlinsbach, Solothurn

Erlinsbach is a municipality in the district of Aarau of the canton of Aargau in Switzerland.

Gösgen District is one of the ten districts of the canton of Solothurn, Switzerland, situated to the northeast of the canton. Together with the Olten District, Gösgen forms the electoral district of Olten-Gösgen. It has a population of 24,793 (as of 31 December 2020).

Salhöhe Pass (el. 779 m.) is a mountain pass in the Jura Mountains of Switzerland between Kienberg in the canton of Solothurn and Erlinsbach in the canton of Aargau. It connects Kienberg in Solothurn and Erlinsbach in Aargau. The pass road has a maximum grade of 9 percent. Although it is the shortest route between Aarau and Basel, traffic over the pass is moderate. After the Bern citizens had conquered the Unteraargau region in 1415, Salhöhe marked the border between the Old Swiss Confederacy and the Further Austrian possessions of the Habsburg dynasty.

Gretzenbach is a municipality in the district of Olten in the canton of Solothurn in Switzerland.

Schönenwerd is a municipality in the district of Olten in the canton of Solothurn in Switzerland.

Niedergösgen is a municipality in the district of Gösgen in the canton of Solothurn in Switzerland.

Stüsslingen is a municipality in the district of Gösgen in the canton of Solothurn in Switzerland. On 1 January 2021 the former municipality of Rohr merged into Stüsslingen.

Schönenwerd railway station (German: Bahnhof Schönenwerd) is a railway station in the municipality of Schönenwerd, in the Swiss canton of Solothurn. It is an intermediate stop on the Olten–Aarau line and is served by local trains only.

Aarau District is a district in the Swiss Canton of Aargau with administrative capital Aarau encompasses the agglomeration of Aarau south of the Juras.

Eppenberg-Wöschnau is a municipality in the district of Olten in the canton of Solothurn in Switzerland.

The Wasserflue is a mountain of the Jura, located north of Erlinsbach in the canton of Aargau. It lies on the range east of the Salhöhe Pass. An antenna is located on the summit

The Geissfluegrat is a minor summit east of the Geissflue, in the eastern Jura Mountains. It is located between the Swiss cantons of Aargau and Solothurn. With an elevation of 908 metres above sea level, the Geissfluegrat is the highest point in Aargau. It is also the easternmost summit above 900 metres in the Jura Mountains.