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National road N-420
Carretera nacional N-420
Route information
Length	803 km (499 mi)
Major junctions
From	Montoro
To	Tarragona
Location
Country	Spain
Highway system
Highways in Spain Autopistas and autovías National Roads

The N-420 is a highway in Spain.

The road starts 36 km east of Córdoba at Montoro (Junction 356 of the Autovía A-4). The N-420 runs north through the heavily wooded Sierra Morena passing over the Puerto de Niella (902m) then crossing the valley of the Rio Montoro before taking the Puerto Pulido to Puertollano. The AVE Sevilla-Madrid runs parallel to the road on its way to Ciudad Real.

Thereafter the road follows the Autovía A-43 before branching north to cross the A-4 again at Puerto Lapice, south of the Montes de Toledo. 21 km to the east the road passes Alcázar de San Juan and the Autovía CM-42 which is an upgrade of the CM-400. The landscape here is dominated by hill top Windmills. The road reaches Mota del Cuervo with a junction on the N-301 and Autopista AP-36, before passing the Castle of Belmonte 15 km later. After a junction with the Autovía A-3 (155 km) in La Almarcha the road passes along the valley of the Rio Jucar to Cuenca, where it crosses N-320. The road then heads east through the Serranía de Cuenca, crossing the Puerto de Rocho (1,150m) and into the Rincón de Ademuz before joining the N-330 and heading north. After 34 km the road reaches Teruel and junction with the Autovía A-23, upgrade of the N-234.

The N-420 heads north through the Sierra Palomera, joining the N-211 towards Alcañiz. Then, N-420 crosses the Puerto del Esquinazo (1,381m) and Puerto St Just (1,381m), ending at Tarragona.

• National roads in Spain