For those having trouble finding it, there is a plateau slightly northwest of Durnholde Keep in Hillsbrad Foothills. At the back of this plateau, where it meets the mountains (the Alterac Mountains, incidentally), you should find a small path leading up into the mountains [77, 19]. This path twists back and forth, goes through a small cave, and then leads to Ravenholdt Manor. There is a chest that will spawn Milton Beats if you open it.
See Ravenholdt for more information.
Valentine's Day Seasonal EventEdit
During the Valentine's event quest line before patch 3.3.0, adventurers are led to a valley behind the manor to find Apothecary Staffron Lerent. To reach this valley, first go to the manor then look for a small fighting ring to the right of the manor entrance. Behind that fighting ring is a small mountain pass. Go through that pass and hang a sharp left, and the apothecary will be directly in front of you.[89, 74]