Editing Calimesa, California (section)

===City limits===
Historically, Calimesa is divided from the City of Yucaipa by the Wildwood Canyon Wash; politically, "County Line Road" divides the two towns. Much of what was originally known as "Calimesa" actually lies within the city boundaries of Yucaipa, including "I-Street" (Calimesa) Park and Calimesa Elementary School. Because State of California law prohibits the incorporation or annexation of cities over county lines, the city was unable to adjoin what was considered the town of Calimesa when it finally incorporated. When Yucaipa incorporated, it included the area outside of the Yucaipa Valley on the "hilltop" or "mesa" that was traditionally known as Calimesa within its city boundaries, so as not to leave a gap of unincorporated area between the two towns. Although the two cities are in separate counties, both Yucaipa and Calimesa share the same basic street grid system and addressing, including many named and alphabetical streets which extend from Yucaipa well into Calimesa. The general boundary between the two cities is County Line Road, which does not follow the exact county line in some places due to the alignment of Calimesa Creek, which meanders in and out of both Yucaipa and Calimesa.

The city limits of Calimesa also extend south to the City of [[Beaumont, California]]. Although much less refined, the boundaries between Beaumont and Calimesa fall generally along the Southern California Edison (SCE) right-of-way that extends from the El Casco electrical sub-station facility near [[Moreno Valley, California]], eastward. Near [[Interstate 10]], Champions Drive is the common boundary between the two cities.