Chase Cooper still owns the top two high school pole vault marks, but Corbin Mayes put up a nice set of marks last winter.
This list includes all Steinhauer Field House marks for high school boys in the MileSplit database. Some of these come from college meets, but still by high school athletes. It's entirely possible there are a few stray high school marks dating back to earlier years, but those marks are almost certainly no longer retrievable.
It goes almost without saying that 200 and 400 marks are slower at Steinhauer than even most other indoor venues. The turns are simply so tight at Steinhauer that times are automatically slower for these two events. A sub-23.5 200 or a sub-51.5 400 at Steinhauer are special.