The Luiseño or Payómkawichum are an Indigenous people of California who, at the time of the first contacts with the Spanish in the 16th century, inhabited the coastal area of southern California, ranging 50 miles (80 km) from the present-day southern part of Los Angeles County to the northern part of San Diego County, and inland 30 miles (48 km). In the Luiseño language, the people call themselves Payómkawichum, meaning "People of the West." After the establishment of Mission San Luis Rey de Francia, "the Payómkawichum began to be called San Luiseños, and later, just Luiseños by Spanish missionaries due to their proximity to this San Luis Rey mission.

Temecula is a city in southwestern Riverside County, California, United States. The city had a population of 110,003 as of the 2020 census and was incorporated on December 1, 1989. The city is a tourist and resort destination, with the Temecula Valley Wine Country, Old Town Temecula, the Temecula Valley Balloon & Wine Festival, the Temecula Valley International Film Festival, championship golf courses, and resort accommodations contributing to the city's economic profile.