The Viejas Casino opened its doors on September 13, 1991. In 1977, the Viejas Bingo Room opened in the Ma Tar Awa RV Park on the Viejas reservation. The Viejas tribe is one of seven California tribes that signed a modified compact with Governor Arnold Schwarzenegger granting unlimited slot machines in return for higher payments to the state.
In 1932, The Viejas Band of Kumeyaay Indians purchased the reservation with their share of proceeds from a forced eviction from the area now containing El Capitan Reservoir.