The LeGrande Peterson Family photograph collection consists of 544 studio portraits and snapshots of LaGrande and Helen Peterson, their family and friends (including many of Mrs. Peterson's mother Clara Bean), and scenic pictures mostly from Utah, Nevada, and Southern California. The Utah images were taken in Provo, Fielding, Bear River City, Price, and Payson.

These photographs are part of the LaGrande Peterson Family Manuscript Collection, which contains the papers and writings of the family, catalogued as Mss Coll 313: The LaGrande Peterson Manuscript Collection USU Special Collections also contains a scrapbook of military veterans, which includes LaGrande's military background and picture, catalogued as MSS Coll 183: The Larene Braeger Scrapbook of Military Veterans of box Elder County, Utah (LaGrande is the 6th entry in the scrapbook). Throughout the collection Mr. Peterson's first name is spelled as LeGrand, Le Grande or La Grande.