The Archives of the Big Bend is a department of the Bryan Wildenthal Memorial Library on the Sul Ross State University campus in Alpine, Texas. The responsiblity of the Archives is to collect, preserve, arrange, and make available the University archive, manuscript collections, books, photographs and other research resources which pertain to the area west of the Pecos river and east of present-day El Paso county in Texas as well as related areas of northern Mexico.

Services of the Archives include reference assistance, exhibits, reproduction of photos and print materials, and presentations on the Archives holdings. The Archives provides a reading room for the closed stacks of the library and for research in the manuscript collections. The collections house personal papers of individuals and families, records of regional businesses, newspapers, maps, oral histories, sheet music, and publications of Sul Ross State University.

The reading room of the Archives is open from 8:00 a.m to 5:00 p.m. Monday through Friday. The books and accessible holdings may be located through the Bryan Wildenthal Library online catalog. The catalog record will indicate if an oral history transcript or collection inventory is available in the reading room.

The Archives of the Big Bend actively seeks materials documenting the history and culture of the Trans-Pecos and the Big Bend areas of Texas, with emphasis on Brewster, Jeff Davis, and Presidio counties.