The Castle Indoor Percussion Ensemble is a concert ensemble that participates in our local circuit, the Indiana Percussion Association (IPA).

In 2017, Castle Indoor was the IPA Concert Open State Champion.

In 2018, Castle Indoor was promoted by the IPA to its current classification, Concert World, and placed 2nd. Castle Indoor Percussion has been named PSCW State Runner-Up twice (2018, 2019).

Auditions for Castle Indoor Percussion take place in early December, following the conclusion of the marching season. Rehearsals take place Mondays, Thursdays, and Saturdays, with competitions beginning in February and concluding in April.