Santa Rosa Plateau Ecological Reserve is a park in Riverside County on the edge of the Santa Ana Mountains. The plateau preserves native plants, vernal pools, Engelmann oaks and the historic Moreno and Machado Adobes built in 1846. In the springtime, wildflowers surround the winding trails whose hills turn brilliant shades of green. The geology of the plateau contains rich volcanic history which created a landscape that has looked the same for millions of years.

Santa Rosa Plateau Ecological Reserve