Jurupa Mountains
The Jurupa Mountains are a small mountain range of the Peninsular Ranges System , located in the southeastern Pomona Valley , within northwestern Riverside County and southwestern San Bernardino County of the Inland Empire region , southern California . 
<triplet> Jurupa Mountains <subj> mountain range <obj> instance of <subj> California <obj> located in the administrative territorial entity <triplet> Peninsular Ranges <subj> mountain range <obj> instance of <subj> California <obj> located in the administrative territorial entity <triplet> Riverside County <subj> San Bernardino County <obj> shares border with <subj> California <obj> located in the administrative territorial entity <triplet> San Bernardino County <subj> Riverside County <obj> shares border with <subj> California <obj> located in the administrative territorial entity <triplet> California <subj> Riverside County <obj> contains administrative territorial entity <subj> San Bernardino County <obj> contains administrative territorial entity