Cabrillo NM - located in San Diego, CA

Canaveral NS - located in Titusville, FL

Can River Creole NHP - located in Natchitoches, LA

Canyon de Chelley NM - located in Chinle, AZ

Canyonlands NP - located in Moab, UT

Cape Cod NS - located in Wellfleet, MA

Cape Hatteras NS - located in Manteo, NC

Cape Krusenstern NM - located in Kotzebue, AK

Cape Lookout NS - located in Harkers Island, NC

Capitol Reef NP - located in Torrey, UT

Capulin Volcano NM - located in Capulin, UT

Carl Sandburg Home NHS - located in Flat Rock, NC

Carlsbad Caverns NP - located in Carlsbad, NM

Casa Grande Ruins NM, including Hohokam Ruins NM - located in Coolidge, AZ

Castillo de San Marcos NM - located in St. Augustine, FL

Castle Clinton NM - located in New York, NY

Catoctin Mountain Park - located in Thurmont, MD

Cedar Breaks NM - located in Cedar City, UT

Chaco Culture NHP - located in Nageezi, NM

Chazimal NMEM - located in El Paso, TX

Channel Islands NP - located in Ventura, CA

Chattahoochee River NRA - located in Atlanta, Ga

Chesapeake & Ohio Canal NHP - located in Sharpsburg, MD

Chicago Portage NHS - located in River Forest, IL

Chickamauga & Chattanooga NMP - located in Ft. Oglethorpe, GA

Chickasaw NRA - located in Sulfur, OK

Chimney Rock NHS - located in Baynard, NE

Chiricahua NM, including Ft. Bowie - located in Willcox, AZ

Christiansted NHS - located in Christiansted, VI

City of Rocks N RES - located in Almo, ID

Clara Barton NHS - located in Glen Echo, MD

Claude Moore Colonial Farm - located in McLean, VA

Colonial NHP, including Jamestown & Yorktown - located in Yorktown, VA

Colorado NM - located in Fruita, CO

Congaree SwampNM - located in Hopkins, SC

Constitution Gardens - located in Washington, DC

Coronado NMEM - located in Hereford, AZ

Cowpens NB - located in Gafney, SC

Crater Lake NP - located in Crater Lake, OR

Craters of the Moon NM - located in Arco, ID

Cumberland Gap NHP - located in Middlesboro, KY

Cumberland Island NS - located in Saint Marys, GA

Curecanti NRA - located in Gunnison, CO

Cuyahoga Valley NP - located in Brecksville, OH