Park here and quickly scamper across the road to the lookout on the west side. The lookout is nicely constructed of river rock and gives the feeling of being in a crenellated castle. Lizards are the only inhabitants. You can look down into the deep gorge and see the ribbon of refreshing green alder trees in summer. Also look southeast to see the forest of bigcone spruce and canyon oak clothing the north-facing slopes.
Floods periodically scour the canyon and debris fills the reservoir behind the dam lower down.
Next the road passes through a tunnel, sometimes marked on maps as the Singing Springs Tunnel. The road cuts through a ridge separating the Big Tujunga from its tributary, Mill Creek. From this point, the Angeles Forest Highway follows the west side of Mill Creek. Immediately on the other side of the tunnel on the west side of the highway is the Hidden Springs Picnic Ground, a convenient rest stop with overlooks and use trails. The trailhead for the Fall Creek Trail is 500' up the road also on the west side.