In 1960, the Rolling River School Division was forced by the province to amalgamate its high schools.  The high schools in Rapid City,  Justice, Forrest and Douglas were to be united into one.  The location chosen was on the east side of the #10 highway at Forrest.  It was called Elton Collegiate

In 1963 two more rooms were added to the north end.

In 1966 two huts joined by a wooden walkway were added also to the north end.

In 1968 November 5 a fire threatened to destroy the entire building but it was brought under control with limited damage, mostly smoke.

In 1974 the gym was expanded to twice its size.                                                                           

In 1975 the south addition of five classrooms, washrooms showers and stage was constructed.

In 1994 the library addition was put on the southwest end of the school

In 1998-99 the grades 7 and 8 moved back to the elementary school to take their classes.

In 2006 the old huts were closed

In 2002 a new Canteen and multipurpose room were added to the north end.

In 2009 the library moved to the north end of Elton and the old library became the new Band Room.

In 2010 the school was updated with new plumbing and water.