Boulder Reservoir

The Leanin' Tree Museum of Western Art was a private art museum located in Boulder, Colorado. It exhibited the private art collection of Ed Trumble, founder and chairman of Leanin' Tree, Incorporated. Trumble is a publisher of fine art greeting cards since 1949. The collection also included American western art spanning five decades. The museum closed forever on August 31, 2017

Boulder County Poor Farm is the site of a poor farm in Boulder County, Colorado, where long-term care for the county's indigent was provided from 1902 to 1918. The site was operating as a farm from 1897, and many of the original farm buildings are still present, including a main house built in Queen Anne style. It was listed on the National Register of Historic Places in 2011. Starting in 1875, Boulder County leased a series of properties to serve as the county poorhouse. In 1902, the 120-acre (49 ha) farm on today's 63rd Street was purchased to house the institution; many modifications were made to the farm house, including the construction of a two-story dormitory annex. By 1918, a larger building was needed, and the institution was moved to another location. The farm was sold and returned to private operation.

Boulder Municipal Airport (IATA: WBU, ICAO: KBDU, FAA LID: BDU) is a public airport located 3 miles (4.8 km) northeast of the central business district of Boulder, a city in Boulder County, Colorado, United States. It is owned by the City of Boulder and used almost exclusively for general aviation. Its location in the foothills of the Rockies east of the continental divide gives excellent conditions for soaring, and there is extensive gliding activity. It is the base of the Soaring Society of Boulder. Most U.S. airports use the same three-letter location identifier for the FAA and IATA, but Boulder Municipal is BDU (formerly 1V5) to the FAA and WBU to the IATA (which assigned BDU to Bardufoss Airport in Bardufoss, Norway).

The McKenzie Well (also known as McKenzie #1) is an oil well site in Boulder, Colorado. The Boulder Oil Field was discovered on this site in 1901, making it the oldest oil-producing site in the entire Denver Basin, and one of the oldest in the western United States. The first producing well on the site was drilled in 1902. Peak production at 85,000 barrels was reached in 1909.A modern well (built in the 1960s) sits on the site of the original discovery; nothing remains of the original machinery.The McKenzie Well site is listed on the National Register of Historic Places and the Colorado State Register of Historic Properties.

Fourmile Canyon Creek or Four Mile Canyon Creek is a tributary of Boulder Creek. Its source is northwest of Boulder, Colorado and flows through the northern part of the city for part of its length. It should not be confused with a similarly named stream that runs through Fourmile Canyon west of Boulder, which was the site of a major wildfire in 2010. This stream rises west of the old mining settlement of Sunshine. It runs eastward through the foothills of the Front Range in Boulder County, Colorado, south of Left Hand Canyon and north of Sunshine Canyon. The creek exits the mountains to the plains near Lee Hill Road in northern Boulder, then flows east an additional 5 mi (8.0 km) through the plains to its confluence with Boulder Creek near Valmont. This stream is home to Boulder Open Space land, a trailhead, and the Anne U. White Trail. Although Fourmile Canyon Creek is a seasonal intermittent stream in the plains, it is also the target of flash flood prevention efforts.

South Boulder Creek is a tributary of Boulder Creek in central Colorado in the United States. Its source is near Rogers Pass on the Continental Divide. The stream flows to a confluence with Boulder Creek in northeast Boulder. Gross Dam is located on South Boulder Creek, approximately 4+1⁄2 miles west of Eldorado Springs, Colorado.

Valmont 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 Valmont CDP was 59 at the United States Census 2010. The Boulder post office (Zip Code 80301) serves the area.

Walden Ponds Wildlife Habitat is a 102-acre (41 ha) Boulder County, Colorado park. It was reclaimed between 1974 and the 1990s from an open-pit gravel mine on the site, and is named after Walden "Wally" Toevs, the Boulder County Commissioner who spearheaded the plan to convert the gravel pits into a wildlife habitat.After the mining ceased and the property had been stripped 15 feet (4.6 m) down to bedrock, all that was left were open pits and puddles of ground water.The park has several ponds and marshlands, hiking trails, picnic facilities, restrooms, and fishing. It claims to be one of the best bird-watching areas in Boulder County.

The Geological Society of America (GSA) is a nonprofit organization dedicated to the advancement of the geosciences.

Gunbarrel 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 Gunbarrel CDP was 9,263 at the United States Census 2010. The Boulder post office (Zip Code 80301) and Niwot post office (Zip Code 80503) serve the area.

Climbing is a major US-based rock climbing magazine first published in 1970. In 2007, it was bought by Skram Media, the publisher of Urban Climber Magazine. The headquarters of the magazine is in Boulder, Colorado. It is published nine times a year. Climbing was purchased by Outside in 2021.

The Boulder station is a retired train depot in Boulder, Colorado. It was originally built in 1890 in downtown Boulder to serve as a depot for the Union Pacific railroad. The depot was built in a modified Richardson Romanesque style from native Boulder County stone. The depot operated as a train station at its original location until 1957, when a new depot opened and replaced it.The depot was purchased by a bus company and it functioned as a bus transit terminal until 1973, when the Boulder Jaycees' purchase saved it from demolition; it was moved it to a location near the original Boulder County, Colorado Fairgrounds. The efforts of the Boulder Jaycees and Historic Boulder, Inc. were instrumental in preserving the structure.In October 2008, the City of Boulder and the Colorado Regional Transportation District moved the depot again, this time to the site of a new, transit-oriented development on the east side of 30th Street.In December 2015, the depot reopened as a restaurant and bar named Roadhouse Boulder Depot, part of the Boulder Junction at Depot Square development.