Shortly before the trail officially splits for the first time, as described on this site, there is an old-looking "trail" also heading to the left but blocked by timber. Do not take this timber-blocked route, and the "true" left route should be obvious a short distance after that point.
At the point where you first officially take a left turn, there is a small blue circle near the ground. A small arrow points to the path heading right, in the direction of the blowout.
"After the first glass, you see things as you wish they were. After the second, you see things as they are not. Finally, you see things as they really are, which is the most horrible thing in the world."
--Oscar Wilde on Absinthe