Emerald Lake Hills, California
Emerald Lake Hills or Emerald Hills is a census-designated place and neighborhood in unincorporated San Mateo County, in the state of California, United States. Situated among oak-studded hills between Woodside, Redwood City, and San Carlos roughly bounded by Edgewood Road, Alameda de las Pulgas, Farm Hill Boulevard, and Interstate 280. The population was 4,406 at the 2020 census and the per-capita income was $68,966, making it the 22nd wealthiest place in California and the 82nd highest income places in the United States Emerald Lake Hills was originally conceived as a resort community for city-weary San Franciscans during World War I. Emerald Lake Hills actually consists of two large subdivisions created around 1920: Emerald Lake (even though there are two lakes) and Emerald Hills. Residents refer to the area by either Emerald Hills or by Emerald Lake Hills. The name Emerald Hills is now more commonly adopted due to mailing designation rules, as the U.S. Post Office would allow only a two-word name. According to an interview with Yuji Naka, Emerald Hills is the namesake for the famous Emerald Hill Zone, the first level of Sonic the Hedgehog 2. Points of interest Edgewood County Park and Natural Preserve Renowned throughout the San Francisco Bay Area for its spectacular display of spring wildflowers, Edgewood Park occupies of grasslands, chaparral, and wooded foothills between Highway 280 and the homes of Emerald Hills. Known for its biotic diversity, this small wilderness was declared a permanent natural preserve in 1993 with support from the EHHA, thus protecting it from any future development. The park has four entrances: Old Stage Coach Road off Edgewood Road, the Sunset Trailhead off Hillcrest Way, Clarkia Way off Cañada Road, and the Sylvan Way Access. A well-maintained system of trails is open for hikers, joggers, and equestrians. Emerald Lakes Named for the distinctive emerald green water that fills them, the two lakes created by the original developers of Emerald Hills still exist to enhance the beauty of the area. While Upper Emerald Lake on Jefferson Avenue is privately held by the owners of its surrounding shoreline, Lower Emerald Lake is owned and operated by the Emerald Lake Country Club. Formed in 1920, the club is located at 500 Lake Boulevard on the intersection of Oak Knoll and Vista Drive. Club members and their families enjoy swimming, sunbathing, picnicking, and fishing in Lower Emerald Lake during the summer months. Handley Rock Park Located on Handley Trail Way in the center of Emerald Hills, Handley Rock Park features a monolith of sandstone of , the largest formation of its kind in San Mateo County Situated on a lot of , this County-approved private park is operated by the Handley Rock Association, a group of local residents and rock-climbing enthusiasts. Early history Emerald Lake Hills is located in what was once the Rancho de las Pulgas ("Flea Ranch"). This land was granted in 1795 to José Darío Argüello, one of the last governors of Spanish California. The land was later passed on to