The San Luis Valley is a region in south-central Colorado with a small portion overlapping into New Mexico. The Rio Grande with headwaters in the San Juan Mountains about seven miles east of Silverton, Colorado flows through the San Luis Valley and then south into New Mexico. It contains 6 counties and portions of 3 others. The San Luis Valley was ceded to the United States by Mexico following the Mexican–American War. Hispanic settlers began moving north and settling in the valley after the United States made a treaty with the Utes and established a fort. Prior to the Mexican war the Spanish and Mexican governments had reserved the valley to the Utes, their allies. During the 19th century Anglo settlers settled in the valley and engaged in mining, ranching, and irrigated agriculture. Today the valley has a diverse Anglo and Hispanic population.
The historic City of Black Hawk is a home rule municipality located in Gilpin County, Colorado, United States. The city population was 127 at the 2020 United States Census, making Black Hawk the least populous city in Colorado. The tiny city is a historic mining settlement founded in 1859 during the Pike's Peak Gold Rush. Black Hawk is now a part of the Denver-Aurora-Lakewood, CO Metropolitan Statistical Area and the Front Range Urban Corridor.
The Smoky Hill River is a 575-mile (925 km) river in the central Great Plains of North America, running through Colorado and Kansas.
The Colorado River is an approximately 862-mile (1,387 km) long river in the U.S. state of Texas. It is the 18th longest river in the United States and the longest river with both its source and its mouth within Texas.
The Entrada Sandstone is a formation in the San Rafael Group found in the U.S. states of Wyoming, Colorado, northwest New Mexico, northeast Arizona, and southeast Utah. Part of the Colorado Plateau, this formation was deposited during the Jurassic Period sometime between 180 and 140 million years ago in various environments, including tidal mudflats, beaches, and sand dunes. The Middle Jurassic San Rafael Group was dominantly deposited as ergs in a desert environment around the shallow Sundance Sea.
Richard Alexander Fullerton Penrose Jr., better known throughout his career as R. A. F. Penrose Jr., was an American mining geologist and entrepreneur.
The Navajo Sandstone is a geological formation in the Glen Canyon Group that is spread across the U.S. states of southern Nevada, northern Arizona, northwest Colorado, and Utah as part of the Colorado Plateau province of the United States.
The Dakota is a sedimentary geologic unit name of formation and group rank in Midwestern North America. The Dakota units are generally composed of sandstones, mudstones, clays, and shales deposited in the Mid-Cretaceous opening of the Western Interior Seaway. The usage of the name Dakota for this particular Albian-Cenomanian strata is exceptionally widespread; from British Columbia and Alberta to Montana and Wisconsin to Colorado and Kansas to Utah and Arizona. It is famous for producing massive colorful rock formations in the Rocky Mountains and the Great Plains of the United States, and for preserving both dinosaur footprints and early deciduous tree leaves.
Fountain Creek is a stream that originates in Woodland Park in Teller County and flows through El Paso County to its confluence with the Arkansas River near Pueblo in Pueblo County, Colorado. The 74.5-mile-long (119.9 km) creek, once known as the Fontaine qui Bouille, is a tributary of the Arkansas River.
Jackson Township is one of nine townships in Decatur County, Indiana. As of the 2010 census, its population was 988 and it contained 419 housing units.
The Heller Center at Eagle Rock, Colorado Springs, Colorado is a nature preserve bequeathed to the University of Colorado Colorado Springs to support local arts and humanities education.
Crow Creek is a 153-mile-long (246 km) creek and minor waterway of southeastern Wyoming and northern Colorado. Crow Creek is formed at the confluence of the South Fork of Crow Creek with the Middle Fork, followed by the addition of the North Fork about 1.5 miles (2.4 km) downstream. All the major tributaries of Crow Creek begin in the Laramie Range and flow eastward. The headwaters of the North Fork are dammed to form the North Crow Reservoir which supplies the city of Cheyenne, Wyoming. Middle Fork is also dammed, forming the Granite Reservoir and Crystal Reservoir which also supply Cheyenne. South Fork is the only unobstructed section and flows most of the year, but not all the way to Cheyenne. Other tributaries of Crow Creek below the reservoirs are Sand Creek, Spring Creek and Brush Creek, none of which flow year round. Crow Creek continues in an eastward direction passing through the city of Cheyenne, and then heads east and south into Colorado where it eventually flows into the South Platte River.
Sand Creek is a stream noted for the "most spectacular examples of cross-bedded sandstone and topple blocks in North America". Sand Creek flows from the Laramie Mountains in Larimer County, Colorado into Albany County, Wyoming where it joins the Laramie River.
The Fox Hills Formation is a Cretaceous geologic formation in the northwestern Great Plains of North America. It is present from Alberta on the north to Colorado in the south.
Sand Creek is a 14.6-mile-long (23.5 km) tributary that flows into the South Platte River near Commerce City, Colorado. From its source in unincorporated Arapahoe County, it flows through Aurora and Denver before joining the South Platte in Adams County.
Big Sandy Creek is a 211-mile-long (340 km) tributary of the Arkansas River noted for being the location of the Sand Creek Massacre in Kiowa County. Long stretches are dry most of the time on the surface, although water still flows underground. Big Sandy Creek starts near Peyton in El Paso County, Colorado and flows through Elbert, Lincoln, Cheyenne and Kiowa counties before it joins with the Arkansas River in Prowers county east of Lamar.
Ladder Creek is a 230-mile-long (370 km) stream in the central Great Plains of North America. A tributary of the Smoky Hill River, it flows from eastern Colorado into western Kansas.
Saguache Creek is a stream in Saguache County, Colorado. The creek flows 88.5 miles (142.4 km) from the confluence of its North and Middle forks before joining San Luis Creek. Saguache Creek is in the San Luis Closed Basin, the largest endorheic basin in Colorado.
Carrizo Creek Station, a former stage station of the San Antonio-San Diego Mail Line and Butterfield Overland Mail, located in Imperial County, California just east of the San Diego County line. It lies within the boundaries of the Anza-Borrego Desert State Park just west of the Carrizo Impact Area. Its site is located along the bank of Carrizo Creek.
