Temple Hill is located in the foothills of Diamond Bar east of the 57 freeway between the 10 and 60 freeways in Southern California. It is a generally west facing hill and is usable on most afternoons. Home of the Temple Hill Slope Squadron.
From the 57 freeway, exit at Temple Ave. Proceed East to Mission Blvd (1/8 mile). Turn Left on Mission Blvd. At the first right, turn right on Rancho Laguna Dr. Go up the hill to your first right and turn right on Alta Mira Place. This will dead-end into Los Coyotes Dr. Turn Left on Los Coyotes Dr. Go up the hill until you get to a small grove of eucalyptus trees with a big green water tank hidden inside. Park next to the water tank.
Put on your hiking shoes and make sure you have plenty of water (you did bring water, didn't you). You will find a trail on the left side of the water tank at the notch in the retaining wall. Follow that trail around the left side of the water tank and on to the top of the second hill. It is about a .4 mile fairly easy hike (even for us old farts). I strongly recommend supportive shoes (especially near the trailhead) and a supply of water for those hot summer days. Flying is no fun when you're thirsty.