[1] In 1916, Francis Behn Riggs purchased land and buildings on the site of the present Upper Campus.

The farm continued to operate for the benefit of the school kitchen, and boys engaged in an active outdoor life.

In November 1928 the main school building was destroyed by fire but Riggs was able to raise the funds to construct the current brick building in time for the opening of school in September 1929, just months ahead of the Stock Market Crash.

Judy worked closely with trustees, faculty, and parents to increase enrollment, balance the budget, and improve curricular continuity.

Subsequent to Judy Boynton's departure, there was another period of turnover in the heads of school until the merger with Indian Mountain was agreed in 2003.

Under Mr Devey's leadership, enrollment stabilized, the curriculum was further refined, and the school launched a $7 million capital campaign to finance the construction of a new dormitory building with additional faculty housing, (completed in 2012) and a new Student Center (completed in January 2014) as well as to add to the school's endowment.

[citation needed] Also known as IMS, Indian Mountain School has established an arts program that offers opportunities for all students.

They have created an "Electives" program, offering courses ranging from Film Production to Digital Photography to Ancient Greek to Monty Python.

Indian Mountain School has a gymnasium, seven playing fields and three all-weather tennis courts to accommodate IMS athletes during the fall and spring seasons.

During the winter, athletes make use of the gymnasium, swimming pool, the basketball and squash courts, and the ice hockey rinks at The Hotchkiss School.