Highgrove is a census-designated place (CDP) and an unincorporated community in Riverside County, California, United States.

[3][4][original research] The city of Riverside, California has plans to annex Highgrove in the near future.[5][when?

[7] Citrus-farm growers have occupied Highgrove area since beginning of history, with its superior fresh-wind conditions from the west, blowing into east of a cove-shape like terrain, making it one the most valuable places in the Inland Empire for citrus-farming by generations of farmers.

Due to the stronger wind conditions that can easily move air out, a landfill dumping ground was opened in 1947 for discarded farm waste.

[8] In 1970, the Highgrove Agricultural Preserve conservation was formed in order to support the growing number of orange trees from farmers.

More competition on fruit prices had increased daily from new farming businesses in the Central California region.

Highgrove's another biggest threat was its rising land-value and water cost for the groves by the end of 1980s, due to its close-proximity to downtown Riverside, which made farm crops more unprofitable.

By 1990, the preserve contract was not renewed, citing increases of population density, housing shortage, traffic jam, university students commuting to campus, and smog near the city of Riverside.

[10] Today, new construction homes occupy near front of it, across Pigeon Pass Road, on the former Highgrove Agricultural Preserve land.

In 2007, Spring Mountain Ranch master-planned community was originally conceived by RWR Homes, but construction halted due to the 2008 recession, and now KB Home, in 2014, will be completing this long-awaited project today, with no HOA fee as its main selling point.

According to the United States Census Bureau, the CDP has a total area of 3.2 square miles (8.3 km2), all of it land.

The highest-elevation point in Highgrove with homes built is up to 1,400 ft. at the eastside, on the corner intersection of Country Mile Ln.

It's a popular tourist spot to see the panoramic views of San Bernardino County and the highest peak of Mt.

The lowest-elevation point is 848 ft., on the corner intersection of Cannes Ave. and La Ciotat Way, bordering city of Riverside's Northside neighborhood.