Tour des Écrins

The Écrins National Park encompasses the most glaciated terrain in France outside of the Mont Blanc massif. The Tour des Écrins circuits the outer range of the park on mountain trails that are less developed and less trafficked than the TMB, making it a more serious undertaking for a comparable distance. The massif is lower than the Mont Blanc range at its summit (La Barre des Écrins, 4102m) but the circuit stays consistently high, with few descents below 1800m and multiple passes above 2800m.

The route is not a single marked trail. Several variants exist, and the "standard" Tour des Écrins is a composite route assembled from GR54 sections, local trails, and some high-route alternatives that require confidence on steep, sometimes snowy terrain. The most challenging sections are the passes above the La Bérarde valley on the eastern side of the massif — isolated, poorly signed in some places, and requiring map and compass navigation rather than simple waymark following.

The Vénéon valley section is the structural backbone of the eastern circuit — a long, remote valley with the Romanche and Bonne rivers running through it, with steep slopes rising to the glacial cirques above. The road ends at La Bérarde, beyond which the only access is on foot. This remoteness is genuine — La Bérarde has basic accommodation and supplies in season, but it is not a resupply town in the usual sense.

The Oisans section in the north gives access to the famous Galibier and Lautaret passes via the D1091 valley road, but the Tour des Écrins circuit uses the trails above these roads rather than the road corridors themselves. The difference in character is significant.

Weather in the Écrins is influenced by both Mediterranean systems from the south and Atlantic systems from the west. Afternoon thunderstorms are frequent and severe, particularly on the exposed pass sections. The glacial terrain above 2800m requires ice axe capability in early season.

Most runners take 5-8 days. The route rewards experience and penalizes optimism about conditions.