From Malaga Cove Plaza, go west on Palos Verdes Drive West. Right on Paseo Del Mar, right on Via Anacapa, Do not go straight to Via Sola. The street turns left by a school. Right on Via Pacheco, the street ends back to Palos Verdes Drive West.
Follow that road. It becomes Palos Verdes Drive South. Keep going. About 12 miles in or so you will see switchbacks up a hill on the left side near the Trump golf course. Carefully get into the left turn lane and go up the switchbacks.
Continue on that same road until you go up and over the hill and get to a traffic light at the bottom, Palos Verdes Drive North. Once at Palos Verdes Drive North, turn left and proceed for next 4 miles. At the second stop sign, turn left to Via Campesina by a golf course and go up and down a little hill. At the bottom of the hill, turn right at the stop sign. You are back to Malaga Cove Plaza.