In June several people alerted me to the fact that the historic 1930s lookout on Olallie Mountain had burned down. I visited the spot in 2014, but haven’t made it back since. The lookout managed to survive a 2017 wildfire, and it is not known what caused this fire, which apparently happened last fall. After the Rebel Lookout burned in 2017, Olallie was the last one standing in the Three Sisters Wilderness.
There’s an article in the Statesman Journal with more info.