This one is one of those that don’t hide their whereabouts at all. Once you start ascending through this area you’ll spot it from a distance. It is on a boulder, dominating the area, like a lighthouse.
In the nearby Forge Yard you can craft Pelinal’s Aptitude Set. It offers around 1485 maximum health for two set pieces, 180 stamina recovery for three, 180 magicka recovery for four set pieces. If you equip five pieces of the set you gain buff: “your weapon and spell damage both become the highest of the two values”.