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<gpx xmlns="http://www.topografix.com/GPX/1/1" version="1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd" creator="Cirkwi"><metadata><name><![CDATA[La Mare Périlleuse]]></name><desc><![CDATA[Sans doute l’écrivain Stéphane Mallarmé avait-il déjà apprécié cette balade vers la mare Périlleuse, proche de son domaine… «Tout est joli, de mille verts et parfumé», admirait-il au printemps 1896. Labellisé FFRandonnée.Descriptif du parcours :  1. Dos à la gare, aller en face, tourner à droite puis à gauche.  2. Longer la Seine à gauche sur 3 km.  3. Tourner à gauche après le camping, à gauche rue de l’Eglise (Grange aux Dîmes, Eglise) et à droite, rue Grande. Elle enjambe la voie ferrée et débouche rue de Montmélian. Virer à droite, à gauche puis dans la sente à droite entre maisons et jardins. Entrer dans le bois vers la ligne haute tension.  4. A sa hauteur, aller à gauche sur 300 m, virer à droite sous celle-ci et gravir le rocher de Samoreau. Laisser deux layons à gauche puis à droite. La sente longe un mur sur 250 m, croise un chemin dans un talweg, revient suivre le mur sur 1 km et débouche sur une aire de pique-nique. Couper la RD39 (prudence !), prendre la route forestière, le chemin à droite puis celui de gauche.  5. Laisser la rue à droite, le chemin à droite, l’autre à gauche, encore un autre à droite. Rester à gauche à la bifurcation. A l’étoile, prendre le deuxième chemin à gauche. Couper la RD210 et arriver dans un chemin.  ➢ Accès à la mare périlleuse, à 250 m à gauche.  6. Obliquer à droite. Prendre le deuxième chemin à droite sur 1 km, puis la route de Graville à l’Épinard à gauche. Elle vire à droite puis à gauche. Sortir du bois vers la ferme en face, tourner en face, tourner à gauche, à droite sur la petite route de la ferme et couper la RD227. Au château d’eau, suivre la RD110 à gauche et la sente à droite. Elle croise une rue, un chemin. Au cimetière, tourner à gauche.  7. Longer la RD107, descendre le chemin à gauche et reprendre la RD107 à gauche. Elle passe deux ponts.  8. Monter par le chemin à gauche (balisage impossible).  9. A la croisée, en lisière du bois, descendre tout droit. Prendre la rue à gauche, la rue à droite et couper la rue de la Fontaine-de-Sault. Aller à gauche vers l’église puis à droite vers la Seine. Longer le fleuve à gauche sur 750 m.  10. A gauche, par itinéraire utilisé à l’aller, rejoindre la gare.  Communes traversées : Champagne-sur-Seine, Féricy, Héricy et Samoreau Distance : 20.9 km - Temps : 5h00 - Balisage : Jaune - Difficulté : Difficile Accès à la carte : https://www.cirkwi.com/fr/circuit/282887-la-mare-perilleuse]]></desc><author><name><![CDATA[Communauté de Communes Brie des Rivières et Châteaux]]></name></author><link href="http://fichier0.cirkwi.com/image/photo/circuit/1300x1300/282887/fr/0.jpg"><text><![CDATA[Route de Barbeau|CCBRC]]></text></link><link href="http://fichier0.cirkwi.com/image/photo/circuit/1300x1300/282887/fr/1.jpg"><text><![CDATA[Route de Barbeau|CCBRC]]></text></link><link href="http://fichier0.cirkwi.com/image/photo/circuit/1300x1300/282887/fr/2.jpg"><text><![CDATA[Charte du Randonneur FFR|Charte du Randonneur FFR]]></text></link><time>2026-09-11T15:02:51Z</time></metadata><wpt lat="48.4428712" lon="2.7605054"><ele>56</ele><name><![CDATA[Départ]]></name><desc></desc></wpt><wpt lat="48.4466492" lon="2.7557579"><ele>45</ele><name><![CDATA[Point 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