Bull Run is an unincorporated community in Clackamas County, Oregon, United States.

[2] George H. Himes believed the name "Bull Run" may have been because of the presence of wild cattle along the river in the pioneer era of 1849–55.

[3] A 1920s story in the Gresham Outlook states that in the 1860s, a man named Frank Mognet was living in the Cedar Creek area near Sandy.

[3] In 1915, Bull Run had a population of 100, a public school and a large gladiolus farm.

Hood division of the Portland Railway, Light and Power Company interurban railroad.