Enticed by a little romance, spa decadence, mini-vacation or weekend getaway? Check out the specials offered by DoubleTree by Hilton Claremont. Seniors and government & military personnel enjoy special rates, too. The DoubleTree by Hilton Claremont, nestled in the foothills of the beautiful San Gabriel Mountains between Southern California's dynamic Inland Empire and the Los Angeles Basin on Historic Route 66, is just blocks from the seven Claremont Colleges and 10 miles from Ontario International Airport (ONT).