The South Loop Trail is closed indefinitely until further notice, due to the fires in 2013. I found this out the hard way when I went to go hike it today. The road signs say that the Cathedral Rock Picnic area is open, which is where the trail head is, but it is closed.
"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