|Affiliation:||Circle of Ossus|
|Profession:||Leader of Circle of Ossus|
|Voiced by:||Daniel Riordan|
|Games:||Age of Empires III|
|First game:||Age of Empires III
|Last game:||Age of Empires III
"The trapper Pierre Beaumont's past is shrouded in mystery. His accent is French, but hard to place; is he from Quebec, Paris, or New Orleans? In any event, it has been many years since he was near a city - or a bathtub. Clever and bloodthirsty, Beaumont is deadly in a fight, wielding his twin knives with skill and precision."
Beaumont is mentioned to have been a member of the New Orleans aristocracy at one point, but he left the city for the less luxurious life of a trapper, prospector, and hunter. A senior member of the Circle of Ossus, Beaumont uses his knowledge of the wilderness to the Circle's advantage.
During the Mexican–American War, Beaumont and a party of armed men were forced to flee northward to the shelter of an American fort. When the fort was besieged by the Mexicans he assisted its commander, Major Cooper, and entrepreneur Amelia Black in defending it. Discovering Amelia's status as a member of the Black family, the Circle's enemies, Beaumont devises a trap for her in an old mine. However, his attempts fail after Kanyenke, an old friend of John Black, saves her before Beaumont is able to spring his trap. Later on, Beaumont and the Circle head to the location of the Fountain of Youth to collect gold from a long sunken Spanish treasure fleet. Amelia and Cooper chase him out, but Beaumont manages to lure Cooper and kills him before Amelia and the others are able to arrive.
After the events in Florida, Beaumont leads an attack at a hidden Incan city to collect barrels of the fabled water that the Incans collected after Morgan Black destroyed the Fountain. However, Amelia had also arrived at the city, after being sent to Peru by the Seminoles and helping Simón Bolívar and his rebels gain independence from Spain. Amelia and the Incans stop the Circle assault, but Beaumont manages to steal several barrels of the fabled water during the chaos.
Beaumont later returned to the Circle's stronghold in Havana, where Amelia continued to pursue him. With the help of the Cubans and the U.S government, Amelia besieged the fortress. During the battle, Beaumont assists his men in defending the fortress when he is knocked off a battlement, feigning death. After Amelia comes to check if Beaumont is really dead, he rises back up and attempts to kill her, but is stopped by Kanyenke. Amelia then shoots Beaumont, killing him.