Day in and day out, the U.S. Army Corps of Engineers Sacramento District works to ensure that visitors to our Corps parks and lakes are able to enjoy nature at its best. That means a year-round effort by park rangers and staff to keep these lakes, rivers, recreation areas and campsites free of trash and in working order. Once a year, however, many visitors return to our parks, and some come for the first time, to lend a helping hand in the ongoing effort to maintain public lands.