From just to the left of the rockfall sign on the Trail, looking upward.
There is a way through this mess, but you have to go up to find it.
Head for the two pine trees on the left side of the photo.
As you get to the first rocks, you will see a way to get through the rockfall, over, under, around, and through.
(Note: This photo was actually taken as I came DOWN from the trail. Up to that point, I had no idea where I should have gone up, but this is the way)

From the left of the rockfall sign, look for the large tree you see at right, and the two pines above; there are several ways through the rocks, but head in the general direction of those two pines.