La Grande Roche

La Grande Roche ("The Big Rock") is the French name given to a rock formation located along the Arkansas River in North Little Rock. The outcropping is said to have been named by French explorer Jean-Baptise Bénard de la Harpe in 1722. De la Harpe was looking for a mountain or large rock in the region called the "Green Rock" by the Quapaw Indians and purportedly made of emerald. Instead he found and named what is now known as La Grande Roche.

La Grande Roche is made of volcanic blue and black trap stone.