Guide:
Southern Rift, southeast of Ragged Hills Wayshrine, or west of Honrich Tower Wayshrine.
Start at Ragged Hills Wayshrine, and follow the path going south of the main road. It will lead you to the top of the hill, passing through the stone gate with torches on both sides. Continue forward until you reach the edge of the hill and you will see the skyshard down bellow it, on the ground.
