Imperial Highway is a road in Orange and Los Angeles counties in California. It begins at the Anaheim-Orange boundary and runs through several cities until it stops at Dockweiler State Beach in Los Angeles near the Los Angeles International Airport. For much of the way, Imperial Highway is signed as State Route 90. A de facto freeway portion of the route in Yorba Linda is also known as the Richard M. Nixon Parkway. Total length of Imperial Highway is approximately 41 miles (66 km), of which 14 miles (23 km) run through Orange County and 27 miles (43 km) through Los Angeles County.