| Norðurárdalur | |
| Photo Alt: | a shallow river following through a rocky valley floor |
| Coordinates: | 65.4325°N -19.046°W65.4538°N -18.9669°W |
| Translation: | North river valley, from the Icelandic norður (north), á (river), and dalur (valley) |
| Country: | Iceland |
| Region: | Skagafjörður |
| District: | Akrahreppur |
| River: | Norðurá |
| Towns: | Silfrastaðir, Fremri-Kot, Egilsá |
| Orientation: | east-west |
Norðurárdalur (North River Valley) is a valley in eastern Skagafjörður, Iceland bordered by the Bóluá river, which forms the boundary between Blönduhlíð and Norðurárdalur. Route 1 runs through the valley up to Öxnadalsheiði plateau.[1]
The valley runs east-southeast and shortly after curves to the northeast.[2] Its northern side, at the beginning of the valley near Bólugil ravine, is called Silfrastaðafjall mountain and, farther on, takes the name Kotaheiði as it approaches the Valgagilsá river. From that point on, it is known as Silfrastaðaafréttur highland pasture.[3] The valley previously belonged Silfrastaðir but it is now the property of Akrahreppur. Moving south into the valley are Krókárgerðisfjall mountain, then Borgargerðisfjall mountain, and Virkishnjúkur peak at the mouth of the valley, which is the farthest from Norðurárdalur. West of Virkishnjúkur peak, there is a deep tributary valley whose northern mountainside belongs to Egilsdalur valley, while the southern is part of Tungudalur valley, and then crosses into Kjálki.
There is some lowland in the valley, although with the smallest amount around the middle, where Norðurá river runs through extensive sandbanks, and the river's bows curve around the sandbanks in many places. Many tributaries flow into it, including the Kotaá, Valagilsá, Króká, and Egilsá rivers. Some rivers, especially Valagilsá, could pose serious obstacles for travelers before there were bridges.[4] The valley has nice weather and excellent plant coverage. Great reforestation efforts have begun at Silfrastaðafjall mountain. In recent years, over a million trees have been planted there.[5]
On July 6, 1954, there were large landslides following a heavy rainstorm that lasted 24 hours and caused extensive damage, especially at Fremri-Kot, where a landslide came to a standstill right above a residence; and at Ytri-Kot, which was already abandoned.[6]
At most there were seven farms in the Norðurárdalur area, but only three remain: Fremri-Kot, Egilsá, and Silfrastaðir. Egilsá became abandoned in 2009 but was inhabited again in 2010. For a long time, a summer residence for children operated there. It later was also used as a boarding school for mentally disabled teenagers.[7]
Inhabited:
Abandoned:
Historical farms: