Miramar Reservoir is a reservoir located in the Scripps Miramar Ranch community of San Diego, California. Owned, operated and maintained by the City of San Diego, the reservoir was completed in 1960 as part of the second San Diego Aqueduct project. Water flowing south to the reservoir originates from both the Colorado River Aqueduct and the California Aqueduct, brought into San Diego by the San Diego County Water Authority.
The Miramar Reservoir is also a popular recreation site known as Lake Miramar or Miramar Lake to local residents. Activities include boating, fishing, picnicking, and the use of an over 5 mile long trail wrapping around the lake. The stretch of the trail over the dam was fenced off for security reasons after the September 11, 2001 attacks, and reopened in 2007. This scenic stretch provides panoramic views of Mira Mesa, Miramar, University City, and other northern San Diego communities.(Wikipedia)