North St. Vrain Creek Bridge

Lyons is a Statutory Town in Boulder County, Colorado, United States. The town population was 2,209 at the 2020 United States Census, up from 2,033 at the 2010 United States Census. Lyons is located at the confluence of North St. Vrain Creek and South St. Vrain Creek, 20 miles (32 km) east of Rocky Mountain National Park. Due to its location at the intersection of State Highway 7 and U.S. Highway 36 which lead to Rocky Mountain National Park, it is sometimes referred to as "The Double Gateway to the Rockies".

The Old Stone Congregational Church, also known as the First Congregational Church of Lyons, is a historic church in Lyons, Colorado, built in 1894-5 and listed on the National Register of Historic Places in 1976. The First Congregational Church was organized under the sponsorship of the First Congregational Church of Longmont in 1889, less than a decade after E. S. Lyon arrived in the area from Connecticut and bought 160 acres (65 ha) of land that include the original townsite of Lyons. Construction of the church building, on the northwest corner of 4th and High Streets, began in 1894 and was completed on September 23, 1895. The minister and members of the congregation contributed much of the necessary labor, in addition to money and materials. The principal building material was sandstone that was locally quarried, cut by hand and laid in horizontal courses of irregularly sized blocks. The National Register nomination notes that much of the work on the building was done by master stonecutters with the result that the "cutting and fitting [of the stone] is exceptionally well executed." The walls are 20 inches (51 cm) thick.The facade is asymmetrical with the church's principal door leading into the base of a single tower. The door has a semicircular arch of radiating stone voussoirs. Central to the facade are a pair of windows topped by horizontal stone lintels. A decorative feature of the facade is the large arch of voussoirs which rises above the windows. In the gable is an ocular ventilation opening framed by voussoirs and set with louvres. The tower rises to a stone course at the height of the gable, above which is a louvred chamber with a "candle-snuffer" roof. For more than ten years after the completion of the building (until a Methodist church was built in town), this was the only church in Lyons. At the time of its National Register listing, the congregation was affiliated with the United Church of Christ, but it no longer identifies itself with that denomination.

North Fork Little Thompson River is a tributary of the Little Thompson River in Larimer County, Colorado. It flows southeast from a source in Roosevelt National Forest to a confluence with the Little Thompson.

Boulder Geomagnetic Observatory (BOU) is a geomagnetic observation facility operated by the United States Geological Survey (USGS). It is located near Boulder, Colorado at 40°08′15″N 105°14′16″W. The site was established in 1961. Customers of the observatory include the Space Weather Prediction Center (SWPC) and the Air Force Weather Agency (AFWA).

Altona is an unincorporated community and a census-designated place (CDP) located in and governed by Boulder County, Colorado, United States. The CDP is a part of the Boulder, CO Metropolitan Statistical Area. The population of the Altona CDP was 512 at the United States Census 2020. The Boulder post office (Zip Code 80302) serves the area.

Hygiene is an unincorporated community with a U.S. Post Office in Boulder County, Colorado, United States. Application for the first Hygiene Post Office was made by Jacob Stoner Flory of the United Church of the Brethren on May 28, 1883. Originally named Pella, the community's present name stems from a time when it had a sanatorium to work with tuberculosis patients. St. Vrain Church of the Brethren, a historic Church of the Brethren congregation, is located in the town.

Ryssby Church is a church located outside of Longmont, Boulder County, Colorado. The church was built in 1882 by Swedish immigrants, although it fell into disuse between 1914 and 1924. A dedicated committee from the First Evangelical Lutheran Church, the descendant congregation of the Ryssby and Elim churches, maintains the church, organizes events, and funds continuous improvement projects. The church hosts weddings, church picnics, an annual Midsummer service, and Christmas candlelight services in early December.

The Church of the Brethren, also known as the St. Vrain Church of the Brethren and the Old Dunkard Church, is an historic Church of the Brethren meeting house located on Hygiene Road (17th Avenue) in Hygiene in the St. Vrain Valley of Boulder County, Colorado. In 1874, formal organization of the Church of the Brethren was held at the ranch home of Mr. and Mrs. J. R. Ullery led by the itinerant preacher, James R. Gish. The first influx of Brethren came to Colorado from Iowa, settling south of Hygiene in Pella, Colorado. Rev. Jacob S. Flory left Greeley, Colorado with his wife and eight children to carry on the work of the church.In 1879, land was donated for the church. In 1880, the building was erected of rough cut stone, which came from Lyons and was laid in courses of unequal thickness. The total cost of construction, including donated labor, was $2,000. The Hygiene Cemetery surrounded the church, with the original Pella Cemetery lying to the south. Church services were suspended in 1907.In 1984, the church building and the land surrounding it were added to the National Register of Historic Places. In 2004, the Hygiene Dunkard Church was awarded Landmark status in Boulder County.In 2009, the church was deeded to the Hygiene Cemetery Association, which began the work of restoring it. It is the oldest Brethren church still standing in Colorado.

Left Hand Canyon is a canyon, near Boulder, Colorado, United States.

Carter Lake Dam (National ID # CO01650) is a dam in Larimer County, Colorado. The earthen dam was completed in 1950 by the United States Bureau of Reclamation, with a height of 214 feet (65 m), and a length of 1,235 feet (376 m) at its crest. It contains offstream storage as part of the Bureau of Reclamation's Colorado-Big Thompson Project for flood control and irrigation. The dam is owned by the Bureau of Reclamation and operated by the Northern Colorado Water Conservancy District. The reservoir it creates, Carter Lake Reservoir, has a water surface of 1,100 acres (450 ha), about eight miles of shoreline, more than 900 acres (360 ha) of surrounding public land, and a capacity of 112,230 acre-feet (138,430,000 m3). Recreation includes fishing (for rainbow trout, kokanee, brown trout, splake, walleye, yellow perch, bluegill, salmon, largemouth bass, etc.), hunting, boating, camping and hiking.

Vance Brand Airport (ICAO: KLMO, FAA LID: LMO, formerly AMR) is a city-owned public-use airport located three nautical miles (6 km) southwest of the central business district of Longmont, in Boulder County, Colorado, United States. The Airport is named after former NASA astronaut Vance Brand. Although many U.S. airports use the same three-letter location identifier for the FAA and IATA, this facility is assigned LMO by the FAA but has no designation from the IATA (which assigned LMO to RAF Lossiemouth in Lossiemouth, Scotland).

Silver Creek High School is a public high school located in Longmont, Colorado. It is part of the St. Vrain Valley School District. Silver Creek hosts Universal High School, an independent learning program, and the Silver Creek Leadership Academy.