Ontario is located along I-10 in southern California, approx. 35 miles east of Los Angeles. From the West: I-10 (San Bernardino Fwy.) to Mountain Ave. exit. Right (south) on Mountain Ave. (approx. 1.5 miles). Right (west) on W. Holt Blvd. From the East: I-10 (San Bernardino Fwy.) to Mountain Ave. exit. Left (south) on Mountain Ave. (approx. 1.5 miles) to W. Holt Blvd. Right (west) on W. Holt Blvd.