The annual Sacred Springs Powwow is held by Indigenous Cultures Institute, a nonprofit organization dedicated to the research and preservation of the culture, arts, traditions, ceremonies, and languages of the population collectively known as Coahuiltecans.

San Marcos first experienced a powwow in 1995 when the Lucky Tomblin family brought Kiowa and other indigenous people to the area.  The Sacred Springs Powwow is conducted in honor of the Tomblin Family.