Don't see why not, zig zagged through the Pyrenees a few times but never fished it, however, do remember seeing a lot of suitable terrain.
A quick look on Google Earth is the usual trick; stick in both your start and end point in the directions part, then search for familiar looking aerial views of snaking rivers / streams, keep the option for photos on whilst doing this and you'll usually find someone has been obliging, here's the first one spotted, looks good to me:
On the way up:
http://static.panoramio.com/photos/o...l/20266024.jpg
Near Vebre - Grid ref: 42 degs 46'23.51''N - 1 degs 43'13.62''E .
On the way down:
http://static.panoramio.com/photos/o...l/10671204.jpg
Just left of the route between Riutes & Latour-de-Carol - Grid ref: 42 degs 28'8.7'' N - 1 degs 52'40.91''E .
http://www.peche66.org/node/220
Pyrenees
Linear Mode
