For the surname, see Ecker (surname).
Saxony-Anhalt, Lower Saxony, Germany
Southwest of the Brocken in the Harz, 51°N 10°E / 51°N 10°E / 51; 10Coordinates: 51°N 10°E / 51°N 10°E / 51; 10
893 m above sea level
North of Wiedelah into the Oker, 51°N 10°E / 51°N 10°E / 51; 10
124 m above sea level
Oker → Aller → Weser → North Sea
Morgenbrodsbach, Großer Giersbach
Abbe, Fuhler Lohnbach, Blaubach, Schamlahbach
The Ecker is a roughly 26 kilometre long, right-hand, southeast tributary of the Oker which runs mainly through the Harz mountains in the German states of Saxony-Anhalt and Lower Saxony.
From its source to Abbenrode the Ecker is a border river, today running between the federal states of Saxony-Anhalt and Lower Saxony. Prior to German reunification this was also the border between the German Democratic Republic in the east and Federal Republic of Germany to the west.
The Ecker rises around 2.5 km southwest of the Brocken at 890 m above sea level at the Eckersprung. Until the border was reopened it was the end of the Goethe Way (Goetheweg) from Torfhaus. Today there is a large picnic area with toilets at the Eckersprung.
Along a steep, rocky bed, the Ecker initially flows to the Ecker Dam, then through the deeply incised Ecker valley towards the north-northeast, where it passes the Ahlsburg, and then leaves the Harz. The upper Ecker valley is part of the Harz National Park. Only the site of the paper factory, located there since the 19th century, was excluded.
Next, the Ecker runs via Stapelburg to Abbenrode (Nordharz district) before emptying later into the Oker, a tributary of the Aller, just north of Wiedelah (Vienenburg district) on the A 395 motorway at about 120 m above NN. Before Wiedelah some of the water is diverted as the Ecker Ditch (Eckergraben) and only feeds back into the Oker 10 km north of Schladen.
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