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Natural Resources

Santa Rosa Plateau Reserve

The Reserve protects one of California’s finest remaining examples of bunchgrass prairie, with springtime flower displays of chocolate lilies, California poppies, and thread-leaf brodiaea. Springtime also makes a large vernal pool available to visitors, which is accessible by a boardwalk onto this extremely rare type of wetland.

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Western Riverside Multi-Species Reserve

The reserve is home to at least eight types of habitat and up to 16 sensitive bird, animal and plant species. Three types of habitat dominate: Riverside coastal sage scrub, non-native grasslands and chaparral. Smaller habitats include: coast live oak woodland, southern willow scrub and live oak, and cottonwood willow riparian forests.

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Hidden Valley Wildlife Area

Hidden Valley Wildlife Area is located along the Santa Ana River, east of Norco on Arlington Avenue, one mile west of La Sierra Avenue. It is set on 1500 scenic acres and has access to 25 miles of hiking and equestrian trails. Visitors can get away from the noise and lights of the city and enjoy the beautiful views of the river or the bluff overlooking the Santa Ana River bottom.

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