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B 258
B 258
Bundesstraße 258
Route information
Length	166 km (103 mi)
Major junctions
Northwest end	Aachen
Southeast end	Mayen
Location
Country	Germany
States	North Rhine-Westphalia, Rhineland-Palatinate
Highway system
	Roads in Germany; Autobahns List; ; Federal List; ; State; E-roads;

The Bundesstraße 258 is a German federal highway. It starts in Aachen,^[1] crosses the Eifel from northwest to southeast and ends in Mayen.

From Aachen, the road first runs south along the Belgian border. One curiosity on this part is a 3 km long strip at Roetgen where the German federal highway leads through Belgian territory. This strip has no connection to the Belgian road network, and the only notice of the border crossing is a small sign reading Belgien (Belgium in German). There is one house along this strip of road, which has a Belgian post code, but is connected to the German telephone network.

After that, the road runs through Monschau and Schleiden. From Blankenheim the road follows the river Ahr downstream until it leaves the river at Müsch. The road then passes the Nürburgring and reaches its end south of Mayen. Originally, the road went further to the city of Koblenz, but this strip has been downgraded due to the nearby Bundesautobahn 48.

Since 2010 the road has been running from the Relais Königsberg via the Monschauer Straße at Aachen-Lichtenbusch to the Bundesautobahn 44.