There are two ways for you. From Mo Valley take the 60 west to the 15 south and get off on Indian truck trail. Or you can take the 60 west to the 91west in Riverside and hit the 15 exchange south. The 91 has so much traffic though. Whichever route you take you will have to hot the 15 and get off on Indian Truck. Make a left and You will see a Corona lake sign. Its not too far pass the 91. Proboly 6 or 7 miles pass the 91 and 15 exchange.