Born and raised in the Four Corners region and descendant of the southwestern Colorado pioneer Wetherill family, Marietta Eaton has lived in the American southwest for all but three years of her life. She has been involved in archaeology her entire life and has been a land manager since 1979. She is keenly interested in land management and culture histories and the history of the southwest region, particularly in regard to archaeology. Eaton has a teenage daughter and currently resides in Kanab, Utah.
As the division chief for the cultural and earth sciences program, Eaton oversees the Grand Staircase-Escalante National Monumentís programs for geology, paleontology, soils, hydrology, archaeology and history and serves as the committee chair for the science program. She is also responsible for all Native American Indian tribal consultation relating to the monument.
Eaton has been involved in working with volunteers in Arizona and Utah documenting rock art. She specializes in rock art documentation and evaluation and is a graduate of a rock art site management course at the Getty Institute.