Tall Timber, Colorado

Seven Hills 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 Seven Hills CDP was 121 at the United States Census 2010. The Boulder post office (Zip Code 80302) serves the area.

The Boulder Creek Bridge near Boulder, Colorado is a concrete slab and girder bridge which was built in 1953. It was listed on the National Register of Historic Places in 2003.It brings Colorado State Highway 119 over Boulder Creek, and was under Federal rather than state management as the highway provides access from Boulder to the Roosevelt National Forest.It was designed by the U.S. Bureau of Public Roads. It is 100 feet (30 m) in total length, and 39 feet (12 m) wide carrying a 34 feet (10 m)-wide roadbed. It consists of three spans, the main one being 48 feet (15 m) long. It has concrete abutments, wingwalls, and spill-through piers. Steel flex beams on the approach were a later addition.It was deemed technologically significant as one of the first concrete girder bridges in Colorado of a new type, having parabolically arched beams rather than flat ones, and supported by concrete spill through piers.

Crisman 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 Crisman CDP was 179 at the United States Census 2020. The Boulder post office (Zip Code 80302) serves the area.

Mountain Meadows 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 Mountain Meadows CDP was 237 at the United States Census 2020. The Boulder post office (Zip Code 80302) serves the area.

Salina is a former mining town in Boulder County, Colorado, United States, approximately 7 miles (11 km) west of Boulder. Established in 1874, after Colorado's first gold discovery in 1859, Salina was founded by miners who migrated to Boulder from Salina, Kansas. It is located at the junction of Four Mile Canyon and Gold Run roads. The mining camp was originally accessible only by horseback or wagons pulled by mules but later became part of Colorado's Switzerland Trail when the Greeley, Salt Lake, & Pacific narrow gauge railroad was built in the early 1880s. Today, most of Salina's original structures still stand, including the one-room schoolhouse, Salina School, and church, the Little Church in the Pines, despite some impact from the Fourmile Canyon wildfire in 2010 and historic flooding during the 2013 Colorado floods.

Flagstaff Mountain is a foothill on the eastern flank of the Front Range of the Rocky Mountains of North America. The 6,983-foot (2,128 m) peak is located in Boulder Mountain Park in Boulder County, Colorado, United States.

The Little Church in the Pines is a c. 1902-1908 building in the former mining town of Salina in Boulder County, Colorado. The church held regular Sunday School classes for children, and services whenever a traveling minister came to town. As the mining boom came to an end and the town's population shrunk, the building fell into disuse, and briefly served as a mine office before being abandoned. In 1948 it was purchased by a neighborhood group and has been used ever since for nondenominational worship and community events. The Little Church in the Pines was placed on the National Register of Historic Places in 1989. During the 2013 Colorado floods, the ground washed out from underneath half of the building, including the bell tower, and emergency supports had to be installed to stabilize the structure until a new foundation could be built and the area refilled.

The Wall Street Assay Office is a historic commercial building related to precious metal mining in the western outskirts of Boulder, Colorado in an area known as Wall Street. Once a thriving mining town in Boulder County's foothills area, Wall Street is now home to a few dozen residential properties scattered among the remnants of the Storm King mine. The Wall Street Assay Office sits on Four Mile Canyon Dr, now preserved as the James F. Bailey Assay Office Museum. The Wall Street area was home to a variety of metal mining activities in the late 1800s, including a small camp named Delphi. Charles Caryl visited the area in 1889, returned east to raise money, and opened the Gold Extraction Mining and Supply Company in present-day Wall Street in 1897. The Assay Office was constructed along with a store and boarding house, a large mill was built in 1901. The operation failed two years later. The assay office was purchased at a sheriff's sale by James Bailey in 1907. It was used as the office of the Storm King Mine, and later converted into a residence for the Bailey family.

The Salina School, also known as the Salina Schoolhouse, is a one-room schoolbuilding in the former mining town of Salina in Boulder County, Colorado, built around 1875 or 1876. It was listed on the National Register of Historic Places in 1989. Throughout the mining boom, the schoolhouse functioned as a hub of social activity in Salina, hosting dances, box socials, and other community activities. Today the building is owned by the Salina Community Association, a nonprofit group of local residents, and maintained as a space for classes, films, concerts, and other community events.

Pine Brook Hill 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 Pine Brook Hill CDP was 983 at the United States Census 2010. The Boulder post office (Zip Code 80304) serves the area.

Fourmile Canyon or Four Mile Canyon is a mountainous canyon in western Boulder County, Colorado that channels a stream known as Fourmile Creek or Four Mile Creek (this is not Fourmile Canyon Creek which runs a few miles north of Fourmile Creek).). The stream rises at 40.048°N 105.550°W / 40.048; -105.550 on the southern slope of Niwot Mountain, before flowing east and south through the unincorporated communities of Sunset, Wallstreet, Salina and Crisman to the confluence with Boulder Creek at 40.015°N 105.324°W / 40.015; -105.324 in Boulder Canyon, four miles west of the historic location of the Boulder Railroad Depot. The canyon and surrounding area were the site of an eponymous major wildfire in September 2010.

Niwot Ridge is an alpine ecology research station located 65 km north-west of Denver in north-central Colorado. It is on the Front Range of the southern Rocky Mountains and lies within the Roosevelt National Forest. Niwot Ridge is 2,900 metres (9,500 ft) high.