Red Mountain Reservoir, located in Fallbrook, California, serves as a vital water supply source for the region, primarily for irrigation purposes. This earth dam, completed in 1985, stands at a height of 120 feet and has a storage capacity of 1,350 acre-feet. The reservoir is situated on Reche Creek and covers a surface area of 23 acres, with a drainage area of 0.25 square miles.

Managed by a public utility, the Red Mountain Reservoir is regulated by the California Department of Water Resources (DWR) under the Safety of Dams program. The dam has been classified with a high hazard potential, but its condition assessment in 2017 deemed it to be satisfactory. Regular inspections take place, with the most recent one conducted in February 2021, ensuring the safety and reliability of the structure.

With its strategic location and crucial role in water supply management, Red Mountain Reservoir stands as a key asset in the region's water infrastructure. Climate enthusiasts and water resource stakeholders can appreciate the significance of this reservoir in sustaining agricultural activities and safeguarding water resources in San Diego County.