Hitherto, raw materials had to be delivered by road over the pass of Hohe Wacht (Bernau) and along the Prägbach valley.

Shortly before the Baden Revolution, a mule track was laid from Todtnau via Zeiger and Bärental to Altglashütten and connected with roads to Lenzkirch and St. Blasien.

In 1847, the state had assessed the road project as important, but there were disputes over its financing, which was to be provided by the Principality of Fürstenberg and the neighbouring municipalities.

In 1866, a government subsidy of 20,000 guilders was granted, and, in 1868, Bärental and the House of Fürstenberg agreed on an extension of the road to the border with Menzenschwand.

In 1912, the parish of Bärental was committed to make a contribution and work began in 1913, which led to it being widened by 33%, and its gradient reduced from an average of 10.3 to 7.85%.

The southwestern approach is characterized by hairpin bends and climbs 483 metres over a distance of about seven kilometres; the north-eastern ramp is less winding.

The high level of tourist traffic in the area of the Feldberg Pass causes major problems, especially in winter, something often exacerbated by wintry road conditions.