Circuit des 25 Bosses

The 'Circuit des 25 Bosses' (The 25 Bumps) is located in the Massif des Trois Pignons, on the western edge of the Forêt de Fontainebleau. Originally established in the 1970s as a training ground for alpinists, this technical 16km loop remains one of the most demanding day hikes in the Île-de-France region. The trail requires hikers to cross 25 distinct sandstone ridges, involving frequent scrambling over boulders and navigating deep sandy paths. It is an intense physical challenge characterized by constant elevation changes and a unique ecosystem of maritime pines and white sand dunes. Note: Compiled from public sources — not a field report.

The Skyline Trail in Mount Rainier National Park is the quintessential Pacific Northwest alpine experience. Starting from the historic Paradise Visitor Center, this stunning loop takes hikers high above the tree line directly onto the southern flanks of the massive, heavily glaciated Mount Rainier volcano (14,411 ft). The trail weaves through impossibly lush subalpine meadows that, in mid-summer, explode with knee-high wildflowers in every color. As you climb higher, the meadows give way to rugged, rocky moonscapes and permanent snowfields. The apex of the hike, Panorama Point (6,800 ft), lives up to its name, offering sweeping, unobstructed views of the Cascade Range, including Mount Adams, Mount St. Helens, and even Mount Hood in Oregon on a clear day.