Coll d'Ares is a high mountain pass at an elevation of 1.536m (5,039ft) above the sea level, located in the comarca of the Noguera in the province of Lleida, near to the border with Aragón, in Catalonia, northern Spain.
Located within the Serra del Montsec mountain range, in the Pre-Pyrenees, the road to the summit is asphalted, with some narrow parts and a few hairpin turns. The surface is in poor conditions. The scenery is quite nice, particularly when it opens up towards the top of the climb. Open to traffic throughout the year, may be closed for short periods in winter when the weather is bad.
Starting from Àger (C12 road), the ascent is 13.9 km long with 12 hairpin turns. The elevation gain is 924 meters. The average gradient is 6.64%, with some steep sections up to 11.0%. The summit is an essential site for paragliding, paramotoring, hangliding. At the summit, a gravel road climbs up to Sant Alís mountain pass.