|district||Miesbach , Bavaria , Germany|
|Watershed||Weissach||Pittenbach, Walchen , Sylvensteinsee|
|expansion||Bundesstrasse 307 / B 181|
|Lock||B 181 : Driving ban for trucks over 7.5 t from km 0.9 to the state border|
The top of the pass is about 1 km north of the border with Austria and lies in the south of Bavaria in the Mangfall Mountains . The pass connects the valley of the Tegernsee in the north with the Achental ( Tyrol ) and the Walchental in the south. It separates the catchment areas of Weißach / Mangfall / Inn and Walchen / Isar (both tributaries of the Danube ). Stuben, a district of Kreuth, is located at the top of the pass . South of the pass, the Achental branches off from the Achensee to the west as Walchental to Sylvensteinsee . A section of the German Alpine Road leads over the pass ; the section in question is federal road 307 .
In 1495 work began on expanding the mule track over the Achenpass into a driveway. At the same time, some fortifications (e.g. Kaiserwacht in Tyrol) were built along the road . Mainly salt was transported from the Saline Hall to Munich , which made the road an important trade connection.
One of the most important military transit routes for the Bavarian Army led over the Achenpass when it was ruling over Tyrol at the time of Napoleon I (v. A. 1809) . Those who controlled this pass and the fortresses in the municipality of Achenkirch (Tyrol) could gain decisive advantages.