ADAMS	This county has no natural areas.
ALAMOSA	Zapata Falls
ARAPAHOE	This county has no natural areas.
ARCHULETA	This county has no natural areas.
BACA	Comanche Grassland Shell Rock Two Buttes
BENT	This county has no natural areas.
BOULDER	Boulder Mountain Park Colorado Tallgrass Prairie Copeland Willow Carr South Boulder Creek White Rocks
CHAFFEE	Droney Gulch
CHEYENNE	This county has no natural areas.
CLEAR CREEK	Geneva Basin Iron Fens Mount Goliath
CONEJOS	Rajadero Canyon
CROWLEY	This county has no natural areas.
CUSTER	Brush Creek Fen
DELTA	Escalante Canyon Needle Rock
DENVER	This county has no natural areas.
DOLORES	Narraguinnep
DOUGLAS	Castlewood Canyon Roxborough
EAGLE	This county has no natural areas.
EL PASO	Aiken Canyon Hurricane Canyon
ELBERT	This county has no natural areas.
FREMONT	Garden Park Fossil Locality High Mesa Grassland Indian Springs Trace Fossil Locality Mini-Wheeler (Stirrup Ranch Geologic)
GARFIELD	Mount Callahan
GILPIN	This county has no natural areas.
GRAND	Kremmling Cretaceous Ammonite Locality Paradise Park Specimen Mountain
GUNNISON	Gothic Mexican Cut Mount Emmons Iron Fen South Beaver Creek
HINSDALE	Redcloud Peak Slumgullion Earthflow
HUERFANO	This county has no natural areas.
JACKSON	East Sand Dunes North Park
JEFFERSON	Dakota Hogback Ken-Caryl Ranch
KIOWA	This county has no natural areas.
KIT CARSON	This county has no natural areas.
LAKE	Treasurevault Mountain
LA PLATA	Haviland Lake
LARIMER	Blue Mountain - Little Thompson Owl Canyon Pinyon Grove Jimmy Creek Park Creek Sand Creek Specimen Mountain West Creek
LAS ANIMAS	Trinidad K-T Boundary
LINCOLN	This county has no natural areas.
LOGAN	Tamarack Ranch
MESA	Badger Wash Fruita Paleontological Locality Gateway Palisade Gunnison Gravels Pyramid Rock Rabbit Valley Rough Canyon Unaweep Seep
MINERAL	Wheeler Geologic
MOFFAT	Cross Mountain Canyon Irish Canyon Limestone Ridge Lookout Mountain
MONTEZUMA	McElmo
MONTROSE	Escalante Canyon Fairview San Miguel River at Tabeguache Creek Wacker Ranch
MORGAN	This county has no natural areas.
OTERO	This county has no natural areas.
OURAY	This county has no natural areas.
PARK	Antero-Salt Creek East Lost Park Fourmile Creek High Creek Fen Hoosier Ridge Saddle Mountain Treasurevault Mountain
PHILLIPS	This county has no natural areas.
PITKIN	This county has no natural areas.
PROWERS	Two Buttes
PUEBLO	This county has no natural areas.
RIO BLANCO	Blacks Gulch Deer Gulch Duck Creek Dudley Bluffs Lower Greasewood Creek Raven Ridge Ryan Gulch Shell Duck Creek South Cathedral Bluffs Yanks Gulch / Upper Greasewood Creek
RIO GRANDE	Elephant Rocks
ROUTT	California Park
SAGUACHE	Indian Spring Mishak Lakes Orient Mine
SAN JUAN	This county has no natural areas.
SAN MIGUEL	Miramonte
SEDGWICK	This county has no natural areas.
SUMMIT	This county has no natural areas.
TELLER	Dome Rock
WASHINGTON	This county has no natural areas.
WELD	Chalk Bluffs
YUMA	Arikaree River Bonny Prairie