The Grand Randonnée 10 is a long distance hiking trail that runs the length of the Pyrenees Mountains. It closely follows the French/Spanish border, virtually all in France, but with occasional and very brief crossings into Spain. It is about 950kms long, and involves about 55,000m of ascent & descent.

The GR10 winds its way westward from Hendaye on the Atlantic's Bay of Biscay, to Banyuls-sur-Mer on the Mediterranean Sea. The journey is varied - from the steep rolling hills of the Basque Country, through the rugged limestone terrain and peaks of the High Pyrenees, into the deep valleys and spectacular Alpine terrain of the remote Ariège and finally the Mediterranean approach through the Canigou massif.