Aargau Jura Park, Regional nature park in northern Aargau and Solothurn, Switzerland

Aargau Jura Park is a protected nature area spanning across roughly 241 square kilometers between the Aare and Rhine rivers, featuring varied landscapes. The terrain shows dense forests, rocky steppes, and terraced vineyards that together form a diverse patchwork.

The region was long a major center for iron ore extraction, particularly in the Herznach and Wölfinswil areas, where mining left deep marks on the land. This industrial past shapes the area today, as many old mining structures remain visible.

The park's name comes from the Jura hills it protects, and its German name Jurapark Aargau is used on local signs. In Herznach, visitors can walk into a former iron-ore mine and see the mining museum, while Frick displays dinosaur bones found in the region at its Sauriermuseum. The villages of Herznach and Wölflinswil mined iron ore until 1967.

The park covers 31 municipalities in the districts of Rheinfelden, Laufenburg, Aarau and Brugg, 30 in Aargau and one in Solothurn. The Fricktaler Höhenweg links viewpoints such as the observation tower on the Cheisacherhöhe. The Herznach mine and its museum can be visited; the Sauriermuseum and the Klopfplatz are in Frick.

The iron-rich layers near Herznach and Wölflinswil reached their greatest thickness in Switzerland and were mined until 1967. In the Herznach mine, visitors can walk into the former tunnels and see the mining museum. Jurassic layers also yield ammonites, belemnites and shells from the Tethys Sea.