The James San Jacinto Mountains and Oasis de los Osos Reserves are part of the

University of California’s Natural Reserve System (UCNRS). With over 750,000 acres and 39 protected biological field stations that are dedicated “to contribute to the understanding and wise stewardship of the Earth and its natural systems by supporting university-level teaching, research, and public service“, the UCNRS is the world’s largest reserve system managed by a university. The James San Jacinto Mountains and Oasis de los Osos Reserves are administered by the UC Riverside campus.