Refine your search for walks in Lac de Peïrou (Saint-Rémy-de-Provence)
Rocher des Deux Trous, Mont Gaussier and Lac du Peirou via the ladders

Pleasant walk in the Alpilles with magnificent panoramic views in places
Glanum and the Alpilles ridges

From the Antiques de Glanum site, a beautiful climb up the Saint-Clerg valley, which serves as a botanical trail, takes you to the ridges and back down to Lake Peirou (Peirou, on the IGN map).
In the Alpilles

Starting from Saint-Rémy-de-Provence, a beautiful walk along large, clearly-marked, shady trails. Beautiful viewpoints over the Alpilles, the village and the château des Baux-de-Provence.
The fragrant plants of the South and also pines and even cedars.
The Gaudre de Valmouriane via La Verdière

This circuit starts in a pine forest in shady valleys. The return journey is along a ridge trail with panoramic views of the village of Les Baux de Provence, the Alpilles and the adjacent valleys to the north and south.
Warning: This hike has been modified from the one I originally described (due to a gate problem preventing access to part of the route). If you downloaded it before it was updated, please make sure you have the correct version.
The Gaudre de Valample

Starting from the Barrage des Peirou, this hike takes you through the forest and along a ridge trail with panoramic views of the southern slopes of the Alpilles. You can start or end your walk by strolling along the lake.