Adelaide Peak is an unofficially named mountain peak in the southern part of the Temescal Mountains. It lies at an elevation of . Adelaide Peak, California from peakbagger.com accessed April 27, 2015. Peak 2279 is named Adelaide Peak on the Automobile Club of Southern California's City Series map of the Murrieta- Temecula area. Adelaide Peak from mapper.acme.com accessed April 27, 2015 It is composed of Cretaceous granitic rocks of the Peninsular Ranges Batholith.M.P. Kennedy and D.M. Morton, PRELIMINARY GEOLOGIC MAP OF THE U.S. Geological Survey Murrieta 7.5' quadrangle, 1979, RIVERSIDE COUNTY, CALIFORNIA, Version 1.0, USGS, Prepared in cooperation with the CALIFORNIA GEOLOGICAL SURVEY, 2003.
Adelaide Peak is drained on its southern slopes by an officially unnamed tributary arroyo of Murrieta Creek, tributary of the Santa Margarita River. It is drained on its northern slopes by an officially unnamed tributary arroyo of Salt Creek, itself a tributary of the San Jacinto River.
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