Welcome to San Tan Mountain Regional Park. With over 10,000 acres, the southeast Valley park is a fine example of the lower Sonoran Desert. The park ranges in elevation from about 1,400ft to over 2,500ft. Goldmine Mountain is located in the northern area, with a spectacular San Tan Mountain escarpment in the southern portion of the park. The vegetation changes from creosote flats to dense saguaro forest. Various types of wildlife may be observed.