Port de Cabús is a high mountain pass at an elevation of 2.302m (7,552ft) above the sea level, located in the Pyrenees on the Andorran-Spanish border. The pass connects the parish of La Massana (Andorra) with Alins (Spain). It's one of the highest mountain roads of the country.
There are 2 routes to reach the summit. On the Andorran side there’s a tarmac road called CG4. At 2,302m, it’s one of the highest paved roads of Europe. Starting from Andorra, ascent is 21.6 km long. Over this distance, the elevation gain is 1298 heightmeters. The average percentage is 6 %. But on the Spanish side there’s a terrible gravel road, starting in the municipality of Tor.
The unpaved sections of the road can be impassable when wet. In any case, driving 4WD is recommended due to uneven surface. During and after a storm the road may be impassable, even with a four-wheel-drive vehicle and can easily get muddy if it rains making it challenging to get through.The surface of the road is asphalted, gravel and sand, and chains or snow tyres can be required anytime.
Expect a narrow road, without protections, and bordered by a drop of hundreds of meters (many hundreds of feet).Do not travel this pass in severe weather conditions. Avalanches, heavy snowfalls and landslides can occur anytime, being extremely dangerous due to frequent patches of ice. There are sheer drops virtually along the entire route and enough hairpins to make a whirling dervish dizzy.