Sinn (river)

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The Sinn where it enters the Franconian Saale
Location Hesse, Bavaria,  Germany
Reference no. DE: 2448
Length 61.06 km
Source near Oberwildflecken
50°23′07″N 9°58′14″E / 50.385194°N 09.970417°E / 50.385194; 09.970417Coordinates: 50°23′07″N 9°58′14″E / 50.385194°N 09.970417°E / 50.385194; 09.970417
Source height ca. 671 m above sea level (NN)
Mouth near Gemünden into the Franconian Saale
50°03′39″N 9°41′28″E / 50.06083°N 09.69111°E / 50.06083; 09.69111
Mouth height ca. 154 m above sea level (NN)
Descent ca. 517 m
Basin Rhine
Progression Franconian Saale → Main → Rhine → North Sea
Catchment 623.78 km²[1]dep1
Discharge Average low:    1,174 l/sdep1
Average mid:   5,869 l/sdep1
Right tributaries Ziegelhüttengraben, Disbach, Höllgraben, Leinbach, Krechenbach, Schmale Sinn, Gronaubach, Jossa, Aura, Fliesenbach
Left tributaries Oberbach, Mittelbach, Trockenbach, Mitzbach, Röthbach, Kretzengraben

The Sinn is a river that flows through the state of Hesse and the Bavarian province of Lower Franconia in southern Germany. It is about 50 kilometres (31 mi) long and is a right, northerly tributary of the Franconian Saale.


The Sinn emerges in the Franconian Rhön at the foot of the Kreuzberg near the local subdistrict (Gemarkung) of Neuwildflecken. At Zeitlofs on the Hessian-Lower Franconian border it flows into the Schmale Sinn which joins it from the Dammersfeldkuppe to the northeast.

Accompanied in places by the Würzburg−Fulda railway and crossed by the A 7 motorway bridge below Riedenberg, the Sinn initially flows in a southwesterly and then in a southerly direction to Gemünden, where it joins the Franconian Saale just under 700 m before the latter river discharges into the River Main.


The tributaries of the Sinn include (in downstream order): Oberbach, Schmale Sinn, Gronau, Jossa and Aura.

Towns and villages[edit]

The towns and villages along the Sinn and Schmaler Sinn include (in downstream order):


Wildflecken, Oberbach, Riedenberg, Bad Brückenau, Eckarts-Rupboden, Zeitlofs, Altengronau, Jossa, Obersinn, Mittelsinn, Burgsinn, Rieneck, Schaippach, Gemünden, (Oberzell).

Schmale Sinn[edit]

Kothen, Speicherz, the A 7 Grenzwald Bridge, Oberzell, Weichersbach, Mottgers


The existence of the extremely rare Snake's Head Fritillary in the Sinn Valley has been recorded since the 19th century. This plant occurs at heights between 160 and 250 metres in various meadow communities, especially in the wet meadows of the two nature reserves that border one another: the Sinngrund near Obersinn and Sinnwiesen von Altengronau.