|Location Map ( geo)|
|To:||Altaghaderry (border) (C381147)|
|Distance:||6.8 km (4.2 miles)|
|Meets:||N13, R265, B193|
The R237 in County Donegal runs south-east and then east from a point on the N13 in the townland of Tonyhabboc (2 km northeast of Newtown Cunningham) to the Northern Ireland border at Altaghaderry, where there is an end-on junction with the B193 heading towards Derry.