Southern California, often perceived as arid, actually hosts several significant waterways originating from mountain watersheds like the Sierra Nevada and San Bernardino Mountains. These rivers and creeks have historically shaped local communities by providing water, transportation, and influencing settlement patterns. Today, they continue to enrich the region by supporting outdoor recreation, public open spaces, and cultural heritage in towns such as Norco, Bonsall, Santa Paula, Kernville, and Seal Beach.

Each community offers unique connections to its river: Norco is known for its equestrian trails along the Santa Ana River; Bonsall features rural landscapes and wildlife refuges near the San Luis Rey River; Santa Paula highlights industrial and aviation history by the Santa Clara River; Kernville serves as a hub for river-based recreation in the Sierra Nevada; and Seal Beach protects coastal wetlands where the San Gabriel River meets the Pacific Ocean. Together, these riverside towns reflect Southern California’s enduring relationship with its waterways, blending natural beauty, history, and outdoor activities.