Complex sentence: Folsom Lake State Recreation Area is located on and around Folsom Lake, near the Sierra-Nevada foothills city of Folsom, California about 25 miles (40 km) east of Sacramento.
Split into simpler sentences: Folsom Lake State Recreation Area is a state park unit of California, USA, on and around Folsom Lake in the foothills of the Sierra Nevada. It is located near the city of Folsom, California, about east of Sacramento.