GR10 — The Pyrenees Traverse

The GR10 is a monumental, 866km trans-Pyrenean thru-hike that traverses the entire length of the French Pyrenees, from the Atlantic coast at Hendaye to the Mediterranean at Banyuls-sur-Mer. Widely regarded as one of Europe's most demanding long-distance trails, it follows established paths through the high-mountain landscape, crossing numerous iconic passes and dipping into traditional mountain valleys. The journey typically requires 50 to 60 days of sustained effort and is known for its extreme physical attrition due to the constant vertical shifts between valley floors and high cols. Note: Compiled from public sources — not a field report.

The trek to Laguna de los Tres is one of the primary day activities in Los Glaciares National Park, providing a close-perspective view of the granite massif of Mount Fitz Roy (3,405m). The route follows an out-and-back trail through mixed forest and glaciated valleys, passing the Piedras Blancas viewpoint before the final ascent. The journey is defined by a significant transition from the low-lying valley floor to the high-alpine environment of the lagoon, which sits directly below the main peaks.