Cascade d'Ars

The Pyrenees have no shortage of waterfalls, but few actually earn the title of a "great" one. Cascade d'Ars is one that does — a total drop of 246 meters over three tiers, once ranked by 19th-century Pyrenean mountaineer Henry Russell as the most beautiful waterfall in the entire range, rivaling even the famous Cascade de Gavarnie. I hiked it myself recently, and here's what the trail is actually like, for anyone planning the same trip. Where it is and how to get there Cascade d'Ars sits in the Ariège department, in the Couserans region of southwestern France, inside the Parc naturel régional des Pyrénées Ariégeoises. Administratively it belongs to Aulus-les-Bains, a small spa village. The trailhead is right at the edge of the village: follow the D8 road toward Col de Latrape for about 200 meters, and the first hairpin bend marks the start, with a signboard at the trailhead. Parking is free but limited — around twenty spots — so in peak season (July–August) it's worth arriving early, though there's overflow parking elsewhere in the village. From the car park, the trail follows the Garbet river, then switches to the Arse river as you climb toward the source. It took me about an hour and a half to reach the base of the falls, which matches the roughly 90 minutes quoted officially. The waterfall itself sits at around 1,380 m elevation, with a 246 m total drop across three cascading tiers — making it one of the highest waterfalls in the Pyrenees (some sources call it the highest). The middle tier alone spans about 60 meters wide, and the falls are at their most powerful during snowmelt season, from May to June. What the hike is actually like The first stretch is easy and pleasant — a forest track winding through beech woods, with a gentle, steady grade. Just before reaching the falls you'll cross a small footbridge (Passerelle de l'Artigou), then follow the right bank of the Arse river the rest of the way to the base. Reaching the base of the falls is only the first stage, though. If your legs are up for it, it's worth continuing up alongside the waterfall to reach the point where the upper tier crashes down. Standing that close to it — enveloped in spray and the roar of that much water dropping at once — gives you a sense of scale you simply can't get from below. Keep climbing and you reach the source area: a wide, gentle plateau where the water slows down and the grass grows thick — a completely different atmosphere from the thundering falls below, quiet, and if you're lucky, grazing livestock. Push on further upstream and you reach a handful of small high-altitude tarns. This whole area sits at the edge of the Cirque d'Ars, a glacial amphitheater above 2,000 m elevation — the actual source of the waterfall, fed by snowmelt and these high mountain lakes. One warning, though: the second half of the route is a completely different beast from the first. Expect stretches of loose rock from past landslides, mixed with stream crossings and scrambling — some sections require using your hands, and the trail markings thin out, so you'll need to keep an eye out for the route. Waterproof, grippy hiking shoes are a must, especially if the ground is wet. Practical notes Trailhead: free car park at the edge of Aulus-les-Bains (limited spaces) To the base of the falls: about 1.5 hours, easy going Continuing to the source plateau and tarns: much rougher terrain — loose rock and stream crossings, requires some fitness and sure footing Gear: waterproof, non-slip hiking shoes; trekking poles help on the upper section Best season: May–June for maximum water flow during snowmelt; avoid early spring if snow hasn't cleared Maps: IGN 2047ET / 2048OT If you just want to see the waterfall and snap a photo, reaching the base is already worth the trip. But if you've got the time and legs for it, push on further — from the thundering falls, to the quiet grazing plateau, to the silent alpine tarns, this one stretch of trail runs through several different moods of the Pyrenees. It was the most memorable hike of this trip.