Bellou-en-Houlme is a commune in the Orne department in northwestern France.

[4] There are 10 watercourses that traverse through the commune, two rivers The Val du Breuil, and The Gine, in addition to eight streams.

Bellou-en-Houlme also has the largest marsh in the Orne department, shared with Briouze at 167.41 Ha, called the Grand-Hazé.

[5] Grand-Hazé is a 500 acres of Marshland that has been under the protection of the Natura 2000 since 2002, that is shared with Briouze.

[7][5] The Marshland features Camargue horses and Highland cattle.