2021 Map of Lake Mathews

About this map

Lake Mathews dominates the central landscape of this Riverside County region, serving as a primary reservoir terminal for the Colorado River Aqueduct. The terrain transitions from the developed eastern edge of Corona into the high ridges of the Cleveland National Forest to the southwest. This modern survey illustrates the proximity of residential growth in El Sobrante to the protected watershed and the historical mining and clay-processing corridor through the Temescal Valley. Key topographic markers like Monument Peak, Estelle Mtn, and Arlington Mtn define the surrounding heights, while the drainage of the Temescal Wash flows through the southern valley floor. Small settlements and former stops such as Weisel and Arcilla are noted along the transit lines, documenting the persistent footprint of industry and habitation between the Santa Ana Mountains and the Gavilan Plateau.