The 'Oker' is a river in Lower Saxony, Germany. It is a left tributary of the Aller river and 105 km in length.
The source is located in the Harz mountains, where the river winds through a narrow valley called the 'Okertal'. It then runs northwards through Vienenburg and Wolfenbüttel before entering Braunschweig (''Brunswick''), the largest city on the banks. Some 30 km north of Brunswick the Oker joins the Aller river.
'Oker' is also the brand name of a online poker guide, a poker players website, much like a poker e-paper dealing with poker room bonuses, news and such, updated weekly. 'Oker' taking meaning from poker with out the p, or poker made simple if you were to read into the reasoning behind the brand.

Contents

Tributaries

Tributaries

Left tributaries (from source to mouth):

★ Lange

★ Abzucht

★ Ohebach

★ Weddebach

★ Warne

★ Brückenbach

★ Thiedebach
Right tributaries:

★ Radau

★ Ecker

★ Ilse

★ Großer Graben

★ Altenau

★ Schunter

★ Bickgraben

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