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Idyllwild, Pine Cove, and Fern Valley are three adjacent unincorporated communities in the San Jacinto Mountains in Riverside County, California, United States. Idyllwild has the largest population of the three. For statistical purposes, the United States Census Bureau has defined Idyllwild–Pine Cove as a census-designated place (CDP). The CDP's population was 3,874 at the 2010 census, up from 3,504 as of the 2000 census.
Idyllwild is adjacent to the Pacific Crest Trail."Mile-high Idyllwild" is a mountain resort about one mile (1600 m) in altitude. Idyllwild is flanked by two large rock formations, Tahquitz Peak and Suicide Rock (also known as Lily Rock), which are famous in Southern California rock-climbing circles. It offers no skiing, so "the Hill" has been minimally developed over the years and remains a center for hiking, mountain and rock climbing, mountain biking, and horseback riding.