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25 bosses SAS 1
Mountain Spot
25 bosses SAS 2
25 bosses SAS 3
25 bosses SAS 4
25 bosses SAS 5

25 bosses SAS

Bois-le-Roi

Conquer 25 hills in a single day on this demanding 16 km loop through the Fontainebleau forest. Originally mapped by Parisian mountaineers for training, the circuit delivers 800 meters of elevation gain through rocky scrambles, sandy stretches, and pine-scented forests. Each summit rewards you with sweeping views over the Trois Pignons massif.

technical hiking circuit
mountaineer training ground
rocky scrambles & sand
panoramic hilltop views

Tips

⛰️legendary trail, allow a full day with breaks
👟good boots essential, road to parking is rough
🐍watch for wildlife, including snakes in warmer months

25 bosses SAS

71b Rue de la République, 77590 Bois-le-Roi, France