Silver Falls,  Camping,  Aug 29, 2003 - Sep 1, 2003     page 20 / 33

It turns out that millions of years ago a forest existed at roughly the level of the trail behind the falls. Lava flowed over the forest, engulfing the trees. The larger trees held their position and the lava cooled around them. Later, the trees rotted away, leaving several large holes in the overhang above the trail.