In Diablo 4, the Stable Master represents a specific category of Vendors whose specialty lies in services related to Mounts. This sets them apart from other Merchants scattered throughout the game’s map, who offer a variety of different goods for trade.
Here is a map with names and marked locations of stable masters across the regions in Diablo 4. Or you can scroll below to find the same list with maps for individual regions (higher quality).
At the outset of the game, players won’t have immediate access to the Stable Master or the Mount services they provide. In order to unlock these, players have to complete a Priority Quest titled “Donan’s Favor”. This quest is initiated by interacting with the Stable Master located in Kyovashad. Upon successful completion of this quest, players not only gain access to their Mount and associated services but also accomplish the “Mount Up Challenge”.As for their locations, Stable Masters, along with other merchants, tend to be based in large population centers, including cities, settlements, and capitals. A prime example is Kyovashad, the main city in Diablo 4, where a plethora of these vendors can be found. To aid players in locating them, each Vendor and Stable Master is marked with a unique icon on the game’s map.These Stable Masters can be found throughout the various regions of the Diablo 4 world, each manned by unique Non-Player Characters (NPCs). They are found in a number of diverse locales including Scosglen, Fractured Peaks, Dry Steppes, Kehjistan, and Hawezar, each with its own resident Stable Masters.