We stayed in Pradores Bielsa, which is located in the park and walked from the hotel to 2 sets of waterfalls. Not an easy hike but very rewarding! The waterfalls are breathtaking. So is the walk in the valley on any of the many trails. Pick the trail that meets your physical capability and enjoy yourself!
Start of some incredible hiking routes of Pyrenees mountains. View from Balcón de Pineta is breathtaking and if you just have physical capabilities of doing that hiking train, it is totally worth every step you have to take. The earlier you start the better.
Easy drive into the valley. After 14 km you reach the end. Now you can hike up the mountain along a spectacular waterfall, and go further into the Llano de Larri. The more sportive can continue on into the higher altitudes.
Enjoy the bar and restaurant in the Parador, it is worth a visit!