Sentinel Hill is a People's Militia outpost in Westfall and their last stronghold in the region. It is here that the men and women of the People's Militia make their final stand against the Defias Brotherhood in a desperate last attempt to reclaim their homes. It's current population is around 300.
Most human characters visit during their adventures sometime after level 10. Sentinel Hill is located southwest of Stormwind and has only a few vendors. You can also find the Defias Traitor at the Sentinel Tower.
Raids on Sentinel Hill with the goal to kill Gryan Stoutmantle are common, mostly to provoke a response from nearby Stormwind City and draw Alliance players away in preparations for attacks on the city. In addition, the farm just to the right of the road from Sentinel Tower seems to be a popular spot for gold farming; lower-level gold farmers are often seen remaining in that small area, killing the same boars and vultures over and over.
There is a graveyard just outside of Sentinel Hill. Blizzard refers to it as a "default graveyard"[1][2] and so it will be your spawn point if you cannot spawn anywhere else (for example, if your 10-day trial of Burning Crusade expires, yet you are still in Outland and your hearthstone is bound to Shattrath City).
Sentinel Hill in Patch 4.0.3, with the Raging Chasm in the backgroundThe Raging Chasm as seen from inside the walls of Sentinel Hill
In Cataclysm
This section concerns content exclusive to Cataclysm.
In World of Warcraft: Cataclysm, Sentinel Hill will be reinforced with stone walls and new towers. It will be almost completely enclosed, and the inn will finally have its roof repaired.[1]
Inspiration
This could possibly be a reference to the Sentinel Hill in H.P. Lovecraft's story "The Dunwich Horror".
Patch changes
Patch 1.3.0 (07-Mar-2005): The stove at Sentinel Hill in Westfall can be used for cooking.