The Olsen Canyon Reserve is a treasure trove of gently rolling hills and diverse habitats situated in the Temescal Valley area of unincorporated Riverside County. It’s a unique blend of grasslands, coastal sage scrub, and sycamore riparian woodlands. Temescal Creek, which runs along the property’s western boundary, adds another layer of uniqueness, supporting willow riparian scrub along its banks.

As you can see, the Olsen Canyon Reserve is a testament to the beauty of ecological diversity. This diversity not only makes the reserve a haven for native animals and plant species but also a sight to behold for nature enthusiasts.

The Olsen Canyon Reserve regularly hosts sightings of the endangered least Bell’s vireo (a small songbird) and the threatened coastal California gnatcatcher. Other species covered under the Western Riverside County Multiple Species Habitat Conservation Plan (MSHCP) that call Olsen Canyon home include the northern red-diamond rattlesnake, Belding’s orange-throated whiptail, western spadefoot, and the striking Coulter’s Matilija poppy—often called the “fried egg plant” for its large, showy white petals and bright yellow center.

A sprawling 420-acre expanse, the Olsen Canyon Reserve was acquired by the Western Riverside County Regional Conservation Authority (RCA) in 2022. The acquisition, which cost approximately $3.6 million, was made possible through MSHCP Local Development Mitigation Fees, underscoring the community’s commitment to conservation.