The collection has been divided into three main series--personal material, professional and consultant work, and western history subject files and reprints.

Allred's personal files are comprised of correspondence, biographical material, and his own essays and articles. The correspondence has been processed alphabetically by correspondent. Worthy of note are the correspondence files relating to western artist and author Ross Santee. Allred and Santee were friends, and upon Santee's death, Allred began to work on a biography of the late author. While involved in this project, Allred wrote to and received letters from, Santee's friends and relatives concerning the author. This material is found in the Santee correspondence files. Included in this material are two letters from Santee to Allred that are illustrated with watercolors.

In addition to the correspondence and biographical files are a series of articles and essays written by Allred. These articles reflect his interests in cattle breeds, rangeland, cattle trails, members of The Church of Jesus Christ of Latter-day Saints, outlaws, and general western history topics. Several of his essays relate his experiences while a young man "punchin cows" in southern Utah.

The collection contains a small amount of Allred's professional work. After he retired in the late 1960s, he continued to do range work. Pertinent to this area are his notes and the federal reports on a study done on the Bear River Basin drainage system. Also, in the section are reports from work that Allred did in Argentina, Saudi Arabia, and Mali.

Finally, the collection houses subject files and a series of reprints relating to western history topics. These articles have been arranged alphabetically by author.