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| Bóthar R251 | ||||
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| Major junctions | ||||
| From |  R250 at Doon Glebe, County Donegal | |||
| To |  N56 at Caoldroim Uachtarach | |||
| Location | ||||
| Country | Ireland | |||
| Highway system | ||||
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The R251 road is a regional road in Ireland. It is located entirely in County Donegal and runs in a northerly then westerly direction from its junction with the R250 road west of Letterkenny to the N56 east of Gweedore.[1] The route is very scenic: it passes Glenveagh, skirts around the base of Errigal and offers excellent views of the Derryveagh Mountains.