High mountain gave from source to Lac des Gloriettes, tumbling through ~5 km of protected no-kill stretch — the longest in the Hautes-Pyrénées. Fly-only, barbless regulation protects pristine conditions. Wild brown trout in alpine freestone. Spectacular granite terrain with technical pocket-water fishing. Short season driven by snowmelt. This is backcountry water for those seeking wilderness and wild fish.
In the Pyrenean gaves and headwater torrents, resident brown trout move from early-season olives and March browns into strong spring and early-summer stonefly activity, then a long spell of evening caddis and small buzzers, with terrestrials most relevant on wooded lower gaves and much less important high above the tree line.
- Limestone

