The battle of San Pasqual took place five miles east of Mule Hill.

The Mexican Californios attacked General Stephen Kearny's troops on Mule Hill.

Kearny and his troops ran short of food and were forced to eat mule meat, the hill's namesake.

Captain Turner was the one who ordered Lieutenant William H. Emory and a squad of dragoons to attack the Californios lancers, Leonardo Cota's men, at Mule Hill, killing five Californios lancers.

[1][2] A historical marker was placed in 1950 on the northern side of Pomerado Road near Mule Hill by the California Centennial Commission.