My son was visiting from Ohio and we decided to go on an adventure. Highway 39 used to go up through the mountains north of Azusa and connect with Highway 2. However, due to rockslides the last 4 or so miles, those 4 miles of the highway have been closed for years. We decided to drive as far as we could. You can go around the barrier and continue by hiking farther up over a sort of pass. Although my son did go partway, we did not hike to the top. These are photos along the way where you pass two reservoirs that are now used only for flood control. It is not a difficult drive and a fun activity going up into Los Angeles National Forest–an easy day adventure.