what are some of the national parks found there?
Joshua Tree National Park.
Riverside County, California
 Most of Joshua Tree National Park is located in the county. 
what is california state route 78? It is a state highway in the U.S. state of California. what are the two terminals? Oceanside and Blythe. in which year did it begin construction? UNANSWERABLE what is the total length of it? UNANSWERABLE with reference to the second terminal mentioned previously, is that place a city, town or a county? City. in which 'county' is that city located? Riverside County. what is the population of the above mentioned region? 2,189,641. can you name a few plants found there? Blue oak. and name a few animals found there. UNANSWERABLE
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Riverside County, California [SEP] Introduction
Geographically, the county is mostly desert in the central and eastern portions, but has a Mediterranean climate in the western portion. Most of Joshua Tree National Park is located in the county. The resort cities of Palm Springs, Palm Desert, Indian Wells, La Quinta, Rancho Mirage, and Desert Hot Springs are all located in the Coachella Valley region of central Riverside County.