The French Pyrenees hold more than 300 documented canyons, carved over millennia by glacial melt and limestone erosion into vertical corridors that drop as much as 400 meters from ridge to river. These routes remained largely unmapped until the 1970s, when French alpinists adapted rope techniques from climbing and speleology to descend gorges that had been considered impassable. What began as expedition-style exploration evolved into a structured sport with graded routes, fixed anchors, and seasonal flow data published by regional alpine clubs. Canyoning Pyrenees France routes span the range from the Basque foothills near Saint-Jean-Pied-de-Port to the high karst plateaus of Ariège, each drainage system producing distinct characteristics. The western valleys favor short, water-heavy descents through polished granite chutes. The central massif around Gavarnie and Luz-Saint-Sauveur offers multi-pitch rappels down dolomite walls, some requiring 60-meter ropes and anchor redundancy. Eastern canyons in the Pyrénées-Orientales are drier, relying on jumps and friction downclimbs rather than continuous water flow. Most routes are accessible only from June through September, when snowmelt stabilizes and water temperatures rise above 12°C. The sport's technical vocabulary reflects its hybrid origins: a "toboggan" is a natural water slide polished smooth by sediment, while a "marmite" is a pothole deep enough to trap a swimmer. Guides assess routes using a six-factor scale—verticality, water volume, commitment, rope work, aquatic obstacles, and escape difficulty—with combinations like V4-A5-III denoting a route with sustained rappels, high water, and limited exit points. Rescue protocols are standardized across départements, with helicopter extraction points marked on IGN topographic sheets and radio frequencies printed on permits. The Pyrenean canyoning season peaks in July and August, when afternoon thunderstorms can triple flow rates in under an hour. Morning starts are standard practice, with most groups entering canyons between 8:00 and 10:00 to complete descents before the storm window opens. Water temperature remains the limiting factor even in summer; neoprene thickness of 5mm is typical, with some guides requiring 7mm suits for routes involving long swims through shaded pools. The French Federation of Mountain and Climbing Sports certifies all commercial guides, mandating annual rescertification in swiftwater rescue, anchor rigging, and client ratio limits of one guide per eight participants on beginner routes, one per five on technical descents.