Running northwards on SR 110 to the northern terminus in Pasadena, the highway continued east onto Colorado Boulevard. When crossing North Baldwin Avenue, Colorado Boulevard becomes Colorado Street, and after it changes again to Colorado Place. Prior to the opening of the Arroyo Seco Parkway, US 66 began north on Broadway which curves east, ending at Mission Avenue. The highway then continues north on Mission which turns into Huntington Drive and then turns north onto Fair Oaks Avenue until meeting Colorado Boulevard where it turns east. After the extension to Santa Monica, the route moved to Figueroa Street from Sunset Boulevard to Colorado Boulevard until the opening of the Arroyo Seco.