Dolmen de la Grenouille, Dolmen in Saint-Piat, France

The dolmen de la Grenouille is a megalithic chamber in Saint-Piat, Eure-et-Loir, standing in the countryside between Maintenon and the hamlet of Changé. It is built of upright slabs supporting a flat capstone, and it shares its site with a second dolmen and a menhir. The monument is a proposed archaeological site rather than a developed visitor attraction.

The dolmen de la Grenouille is a megalithic monument in Saint-Piat, in the Eure-et-Loir. It is one of several megaliths recorded in the commune, alongside the dolmen du Berceau and a menhir. The monument dates from the prehistoric occupation of the Eure valley, when communities of the region built stone tombs; the sources consulted do not document its excavation or its builders.

The name "la Grenouille" (the frog) is the one used for this dolmen in Saint-Piat, distinct from the dolmen du Berceau nearby. The monument is a megalithic structure of upright stones and a capstone, and it is listed as a proposal in the local archaeological record. Visitors can see the stones in their rural setting between Maintenon and Changé.

The dolmen stands in open countryside near Saint-Piat, reached on foot along field paths, so wear sturdy shoes and expect no facilities on site. The stones are best seen in low raking light, when the shapes of the uprights and capstone read clearly. The site is unprotected and unfenced; do not climb on the slabs.

The dolmen de la Grenouille is one of several megalithic monuments recorded around Saint-Piat, in the Eure valley between Maintenon and Changé. Its name, "frog", is a local toponym rather than a description of the stones. The monument is listed as a proposal for protection, so it is not developed for visitors and has no on-site panels or facilities.