The Old Spanish Trail Association Collection is divided into four series, historic/administrative, publications, mixed media and Presidential. The historic papers include: newsletters, correspondence, research, map and trail guides, and some administrative files. Publications include all materials published by or about the Spanish Trail system. The Presidential series are the papers donated by Old Spanish Trail Association (OSTA) Presidents Harold Steiner, Ashley Hall and Vicki Felmlee. They include correspondence, administrative, and research notes.

ORGANIZATION Minimal physical arrangement occurred. Items have been kept in their original order, and have been arranged only intellectually.