Contains books related to various aspects of Clinton Larson's life and career, including religion, athletics, coaching, secondary and college education, Boy Scouting, various events (the Olympics and World's Fair), and the United States Army.

Collection focuses on Clinton Larson's athletic, military, and physical education careers and include correspondence between him and his wife between 1917 and 1921, photographic slides from his larger collection, books that largely feature Clinton Larson as an athlete, clothing and accessories both from World War I and track meets, trophies and medals, scrapbooks that include newspaper clippings and photographs, and personal and professional documents, all dating between 1892 and 1980.

The Lillian Foster Larson Simonsen papers include journals, books, correspondence, creative writing samples, and scrapbook materials relating to Lillian Simonsen and her family, primarily her first husband, Clinton Larson, and her son, Clinton Foster Larson. Materials date between 1816 and 1988.