The area became a national monument in 1908. The 1990 addition of two Spanish mission sites, Guevavi and Calabazas, increased the total acreage to 47. It later was expanded again to include a mile of the Santa Cruz River riparian corridor and mesquite bosque (forest) and now encompasses 360 acres. Guevavi and Calabazas can be visited by reservation only. A historic museum distinguished by architectural features of the Sonora missions unfolds local history and describes mission life.
A self-guiding tour includes the church and cemetery, mortuary chapel, the convent area, a patio garden and a visitor center/museum. Picnic facilities are available. Allow 1 hour minimum. Daily 9-5; closed Thanksgiving and Christmas. Admission, valid for 7 days, $5; free (ages 0-15). Prices may vary; phone ahead. Inter-agency passes are accepted. Phone (520) 398-2341.