N-634 road (Spain)

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National road N-634 shield}}

National road N-634
Carretera Nacional N-634
Route information
Length736 km (457 mi)
Major junctions
FromSantiago de Compostela
ToSan Sebastián
Highway system

The N-634 is a highway in northern Spain. It connects Santiago de Compostela with San Sebastián.

In Islares, Cantabria
Bridge between Asturias and Galicia, over the Eo river.
N-634 bridge in Ribadedeva, Asturias

It starts at Santiago de Compostela at a junction with the N-550.and crosses the Autopista AP-9 heading north east. There is a junction with the N-547; the road meets junction 140 with the Autovía A-6. After 17 km the road splits and heads north passing Vilalba; the road then climbs to cross the Porto da Xesta (545m) before dropping into Mondoñedo. The road follows the Rio Misma to the coast and a junction with the N-642.

The road turns east along the coast through Ribadeo where it meets the N-640. After Luarca the road turns south and inland while the N-632 continues along the coast; the road rises steeply to La Espina and then turns east past Salas. The road has been upgraded to the Autovía A-63 after Grado into Oviedo.

The road commences again east of Oviedo at junction 14 of the Autovía A-64 passing along the Piloña valley; the road passes Arriondas before joining the Autovía A-8 (junction 326). The A-8 is an upgrade of the original road running along the coast and re-emerges between Llanes and San Vicente de la Barquera. Thereafter the N-634 runs parallel to the motorway until Torrelavega and links with the Autovía A-67 and the N-623 road; the road then loops south east before again running parallel to the A-8.

The road has been downgraded but enters Bilbao, it then has a junction with the N-240. It runs parallel to the A8 rejoining the coast at Deba, it runs along the coast through Zarautz before reaching San Sebastián and a junction with N-I.