Réserve de biosphère de Fontainebleau et du Gâtinais, Île-de-France, France
8.6 miles (13.8 km) · 1,602 ft elevation gain · Loop · trail · Route
Sentier des 25 bosses is a 8.6-mile loop route in Réserve de biosphère de Fontainebleau et du Gâtinais, Île-de-France, France, gaining 1,602 feet of elevation. The route follows a valley-shaped elevation profile. The terrain covers 4 distinct sections with no major climbs. About 63% of the terrain is runnable, with significant hiking sections. The route opens with mixed terrain and finishes with flat terrain.
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