Unterer Hauenstein Pass (el. 691 m.) is a mountain pass in the Jura Mountains between the canton of Basel-Country and Solothurn in Switzerland.
| Unterer Hauenstein Pass | |
|---|---|
 Unterer Hauenstein Pass | |
| Elevation | 691 m (2,267 ft) |
| Location | Switzerland |
| Range | Jura Mountains |
| Coordinates | 47°22′52.88″N 7°52′8.14″E / 47.3813556°N 7.8689278°E |
It connects Buckten in Basel-Country and Trimbach in Solothurn. The pass road has a maximum grade of 6 percent.
The pass was probably already used by the Romans. In 1993, Roman artifacts were discovered at the pass. It also lies close to the Roman settlement of Augusta Raurica.
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