Maybe they can tap into the geothermal energy! Or have some other use for it, but let's see if it's true first.

Hello dudes,
I am a student of volcanic geology and have a crisp natural understanding of geology. My idea is that the whole cascade system is all interconnected by their plumbing. There may be several volcanoes that draw from the same magma source and the same thing with the other cascade volcanoes. It is unlikely that every volcano from Lassen and Shasta to Mt. Raineer share the same magma reservoir because of the differing nature of these volcanoes and the composition of their eruption material.

Crater Lake itself is quite massive and alone can produce supervolcanic euptions on the order of erupting 12 cubic miles (50cubic km) of rhyolite.
While leaving behind a six mile wide caldera. This one is in Washington.

Have you ever read any library books on the cascade volcanoes, well I have, and much of the information had eruptions occuring in the 1800s where there was activity coming from five or more volcanoes during a short ammount of time. Apperently they like to wake up in symphony. The only exception was the hyperactive Mt Saint Helens who erupts much more often than any other cascade volcano.

This would suggest the existence of connective plumbing between these mountains and that they are feeding from the same magma chamber.
I would say that it would be very fun if all of the Cascade volcanoes were to wake up for me to study, lol. I can't wait until I am a volcanologist and can study active volcanoes.
Later on dudes that is my ten cents.

Angel One