Olallie Butte has at its summit a United States Forest Service fire lookout tower, which was built in 1915 with a cab and tent cabin. It stands at a height of . The mountain summit also had a cupola cabin beginning in 1920, though it was abandoned in 1967 and the roof collapsed in 1982. The structure's remains can still be seen on top of Olallie Butte. Olallie Butte is also close to a power transmission line corridor.