"Broken Top is a craggy volcanic remnant that hosts two glaciers situated at the eastern border of the Three Sisters Wilderness, directly north of Mount Bachelor. Broken Top has had a violent eruptive history, including a massive hot avalanche that devastated an estimated 200-square-mile area, including what are now suburbs of Bend. The mountain was significantly higher at one time, but the combination of being blown up and worn down by glaciation took a lot off the top.
Interestingly, climbers can see the former interior of the volcano, including its stratification, which has been revealed by erosion. The routes all involve rock of varying degrees of difficulty, inconsistency and instability. Rockfall is a real danger on all Broken Top routes, and helmets should be considered mandatory. Like North Sister, no route on Broken Top is really recommended. If all you want to do is summit, take the Northwest Ridge route. The Northwest Ridge is the fastest and safest descent for all routes on Broken Top. Some glacier travel is required for all routes except the Northwest Ridge."