Rapid City High School is a four-story, steel-framed,
Beaux-Arts-style building on a concrete foundation. Its ground floor exterior is encased in
Kasota limestone, while the upper levels are all red brickwork with more decorative limestone
molded dentils. The parapet rising above its flat roof is topped with simple limestone blocks; just below this parapet sits a metal
cornice. The lower three stories were part of the original structure in 1923, and the fourth floor was not added until 1948. The main entrance on Columbus Street projects out slightly from the rest of the building, with access provided by a set of concrete stairs. "Rapid City High School" is engraved in the limestone veneer above the front entryway. This entrance is flanked by two metal lampposts on either side. The entire area of the building is . Two courtyards divide the separate wings of the buildings; they were originally covered by
skylights, but these were removed in 1977. The
auditorium dates back to 1937. The stage measures deep and long. Two sets of stairs lead from the auditorium to the stage, and a small
gallery houses the stage's light and curtain mechanisms. The interior is intricately designed; a
proscenium arch rises above the stage. The upper part of the auditorium and the ceiling include intricate molding that camouflage the steel support
joists. When originally constructed, it could house 1,402 audience members. ==Performing Arts Center of Rapid City==