Friendship Mound (also known as Rocky Bluff) is a castellated mound, located just north of the village of Friendship, Adams County, in the U.S. state of Wisconsin. It is the highest point in Adams County, with an elevation of , and a prominence of . (Note, however that the adjacent Roche-A-Cri Mound in Roche-A-Cri State Park is locally regarded as "not far behind".) Friendship Lake is also adjacent to this mound (notably separated by Wisconsin Highway 13).