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Baseline Road is a major east-west street in
Boulder, Colorado Boulder is a home rule city that is the county seat and most populous municipality of Boulder County, Colorado, United States. The city population was 108,250 at the 2020 United States census, making it the 12th most populous city in Color ...
that extends east of the city through parts of four counties. The western terminus of Baseline Road is at Flagstaff Mountain in the City of Boulder Mountain Parks. The eastern terminus is at 16800 Watkins Road, about east of Lochbuie on the boundary between Adams and Weld Counties. The total length of Baseline Road is approximately , all of which is within the Denver-Aurora-Boulder Combined Statistical Area in
Colorado Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of t ...
. Baseline Road runs almost exactly along the 40th line of
latitude In geography, latitude is a coordinate that specifies the north– south position of a point on the surface of the Earth or another celestial body. Latitude is given as an angle that ranges from –90° at the south pole to 90° at the north pol ...
.


Origin of the name

On May 30, 1854, the Kansas-Nebraska Act created the
Kansas Territory The Territory of Kansas was an organized incorporated territory of the United States that existed from May 30, 1854, until January 29, 1861, when the eastern portion of the territory was admitted to the United States, Union as the Slave and ...
and the Nebraska Territory, divided by the
40th parallel north The 40th parallel north is a circle of latitude that is 40 degrees north of the Earth's equatorial plane. It crosses Europe, the Mediterranean Sea, Asia, the Pacific Ocean, North America, and the Atlantic Ocean. At this latitude the sun is vis ...
. The Pike's Peak Gold Rush of 1858-1861 lured thousands of gold seekers into the goldfields of the northwestern Kansas Territory and the southwestern Nebraska Territory. On February 28, 1861, the western portion of the Kansas Territory and the southwestern portion of the Nebraska Territory were incorporated into the new
Colorado Territory The Territory of Colorado was an organized incorporated territory of the United States that existed from February 28, 1861, until August 1, 1876, when it was admitted to the Union as the State of Colorado. The territory was organized in the w ...
. The 40th parallel became the primary baseline for
surveying Surveying or land surveying is the technique, profession, art, and science of determining the terrestrial two-dimensional or three-dimensional positions of points and the distances and angles between them. A land surveying professional is ca ...
the land in the eastern portion of the new territory, and a road was eventually cut along the survey baseline.


Official names for the road

The road along the 40th parallel is officially named Baseline Road in
Boulder County Boulder County is a county located in the U.S. state of Colorado of the United States. As of the 2020 census, the population was 330,758. The most populous municipality in the county and the county seat is Boulder. Boulder County comprises th ...
and the
City and County of Broomfield Broomfield is a consolidated city and county located in the U.S. state of Colorado. Broomfield has a consolidated government which operates under Article XX, Sections 10-13 of the Constitution of the State of Colorado. The Broomfield population ...
, 168th Avenue in Adams County, and County Line Road or Weld County Road 2 in
Weld County Weld County is a county located in the U.S. state of Colorado. As of the 2020 United States Census, 2020 census, the population was 328,981. The county seat is Greeley, Colorado, Greeley. Weld County comprises the Greeley, CO Metropolitan Stati ...
. A stretch of Baseline Road, from
US 287 U.S. Route 287 (US 287) is a north–south (physically northwest–southeast) United States highway. At long, it is the second longest three-digit U.S. Route, behind US 281. It serves as the major truck route between Fort Worth and Am ...
in Lafayette to I-25 in Broomfield, is part of State Highway 7.


Description

Baseline Road descends from Flagstaff Mountain (site of the 1935
CCC CCC may refer to: Arts and entertainment * Canada's Capital Cappies, the Critics and Awards Program in Ottawa, Ontario, Canada * ''Capcom Classics Collection'', a 2005 compilation of arcade games for the PlayStation 2 and Xbox * CCC, the pro ...
Sunrise Amphitheatre) and runs through the city of
Boulder In geology, a boulder (or rarely bowlder) is a rock fragment with size greater than in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In c ...
for its first four miles (6 km). Within Boulder, it passes the
Colorado Chautauqua The Colorado Chautauqua, located in Boulder, Colorado, United States, and started in 1898, is the only Chautauqua west of the Mississippi River still continuing in unbroken operation since the heyday of the Chautauqua Movement in the 1920s. It i ...
, a
National Historic Landmark A National Historic Landmark (NHL) is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance. Only some 2,500 (~3%) of over 90,000 places listed ...
, near 9th Street; crosses State Highway 93 (Broadway); then passes the University of Colorado Law School just east of Broadway. The road then crosses
US 36 U.S. Route 36 (US 36) is an east–west United States highway that travels approximately from Rocky Mountain National Park, Colorado to Uhrichsville, Ohio. The highway's western terminus is at Deer Ridge Junction, an intersection in ...
(28th Street), passes the Williams Village dormitory towers of the University of Colorado, and crosses State Highway 157 (Foothills Parkway). East of 55th Street, the road seems to terminate at Cherryvale Road. It actually continues, shifted slightly to the north, following a small northbound stretch of Cherryvale. Thereafter, the road leaves the city of
Boulder In geology, a boulder (or rarely bowlder) is a rock fragment with size greater than in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In c ...
and takes on a more rural character until approaching State Highway 42 (95th Street). At that point the more urban surroundings of Lafayette are evident, and the next two miles (3 km) run through the heart of Lafayette, including the road junction with
US 287 U.S. Route 287 (US 287) is a north–south (physically northwest–southeast) United States highway. At long, it is the second longest three-digit U.S. Route, behind US 281. It serves as the major truck route between Fort Worth and Am ...
(N. 107th St.). About one mile (1.6 km) beyond the eastern city limits of Lafayette, the road crosses the eastern boundary of
Boulder County Boulder County is a county located in the U.S. state of Colorado of the United States. As of the 2020 census, the population was 330,758. The most populous municipality in the county and the county seat is Boulder. Boulder County comprises th ...
and passes the
Erie Municipal Airport Erie Municipal Airport is an airport in Weld County, Colorado, United States. It is owned by the Town of Erie and located three  nautical miles (6  km) south of its central business district. This airport was included in the Nationa ...
. For two miles (3 km) beyond this point, Baseline Road forms the boundary between
Weld County Weld County is a county located in the U.S. state of Colorado. As of the 2020 United States Census, 2020 census, the population was 328,981. The county seat is Greeley, Colorado, Greeley. Weld County comprises the Greeley, CO Metropolitan Stati ...
and the
City and County of Broomfield Broomfield is a consolidated city and county located in the U.S. state of Colorado. Broomfield has a consolidated government which operates under Article XX, Sections 10-13 of the Constitution of the State of Colorado. The Broomfield population ...
. For the next two miles (3 km), from Sheridan Parkway to the interchange with I-25, the road passes through a rural northern portion of the
City and County of Broomfield Broomfield is a consolidated city and county located in the U.S. state of Colorado. Broomfield has a consolidated government which operates under Article XX, Sections 10-13 of the Constitution of the State of Colorado. The Broomfield population ...
. Just east of I-25, the road abuts a commercial area in the extreme northern part of the city of Thornton. For the next mile, from this point to York Street, Baseline Road marks the boundary between Adams County and the
City and County of Broomfield Broomfield is a consolidated city and county located in the U.S. state of Colorado. Broomfield has a consolidated government which operates under Article XX, Sections 10-13 of the Constitution of the State of Colorado. The Broomfield population ...
. From York Street east, the road forms the boundary between Adams County and
Weld County Weld County is a county located in the U.S. state of Colorado. As of the 2020 United States Census, 2020 census, the population was 328,981. The county seat is Greeley, Colorado, Greeley. Weld County comprises the Greeley, CO Metropolitan Stati ...
for the remainder of its length. East of York Street, about of rural road ensue, until
Brighton Brighton () is a seaside resort and one of the two main areas of the City of Brighton and Hove in the county of East Sussex, England. It is located south of London. Archaeological evidence of settlement in the area dates back to the Bronze A ...
is entered near
US 85 U.S. Route 85 (US 85) is a north–south United States Highway that travels in the Mountain and Northern Plains states of the United States. The southern terminus of the highway is at the Mexican border in El Paso, Texas, connecting wi ...
. Baseline Road passes through the northern part of
Brighton Brighton () is a seaside resort and one of the two main areas of the City of Brighton and Hove in the county of East Sussex, England. It is located south of London. Archaeological evidence of settlement in the area dates back to the Bronze A ...
for about five miles (8 km), eventually reaching the town of Lochbuie and the interchange with
I-76 Interstate 76 may refer to: Interstate Highways in the United States * Interstate 76 (Colorado–Nebraska) * Interstate 76 (Ohio–New Jersey), running through Pennsylvania Video gaming * ''Interstate '76 ''Interstate '76'' is a vehicular c ...
. Beyond
I-76 Interstate 76 may refer to: Interstate Highways in the United States * Interstate 76 (Colorado–Nebraska) * Interstate 76 (Ohio–New Jersey), running through Pennsylvania Video gaming * ''Interstate '76 ''Interstate '76'' is a vehicular c ...
the road once again takes on a rural character and continues to its eastern terminus at 16800 Watkins Road.


Counties

*
Boulder County Boulder County is a county located in the U.S. state of Colorado of the United States. As of the 2020 census, the population was 330,758. The most populous municipality in the county and the county seat is Boulder. Boulder County comprises th ...
*
City and County of Broomfield Broomfield is a consolidated city and county located in the U.S. state of Colorado. Broomfield has a consolidated government which operates under Article XX, Sections 10-13 of the Constitution of the State of Colorado. The Broomfield population ...
*
Weld County Weld County is a county located in the U.S. state of Colorado. As of the 2020 United States Census, 2020 census, the population was 328,981. The county seat is Greeley, Colorado, Greeley. Weld County comprises the Greeley, CO Metropolitan Stati ...
(south boundary) * Adams County (north boundary)


Cities and towns

*
Boulder In geology, a boulder (or rarely bowlder) is a rock fragment with size greater than in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In c ...
* Lafayette * Erie (south boundary) * Broomfield * Thornton *
Brighton Brighton () is a seaside resort and one of the two main areas of the City of Brighton and Hove in the county of East Sussex, England. It is located south of London. Archaeological evidence of settlement in the area dates back to the Bronze A ...
* Lochbuie (south boundary)


Highway junctions

* State Highway 93 (Broadway) in
Boulder In geology, a boulder (or rarely bowlder) is a rock fragment with size greater than in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In c ...
*
US 36 U.S. Route 36 (US 36) is an east–west United States highway that travels approximately from Rocky Mountain National Park, Colorado to Uhrichsville, Ohio. The highway's western terminus is at Deer Ridge Junction, an intersection in ...
(28th Street) in
Boulder In geology, a boulder (or rarely bowlder) is a rock fragment with size greater than in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In c ...
* State Highway 157 (Foothills Parkway) in
Boulder In geology, a boulder (or rarely bowlder) is a rock fragment with size greater than in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In c ...
* State Highway 42 (95th Street) in Lafayette *
US 287 U.S. Route 287 (US 287) is a north–south (physically northwest–southeast) United States highway. At long, it is the second longest three-digit U.S. Route, behind US 281. It serves as the major truck route between Fort Worth and Am ...
(N. 107th St.) in Lafayette * State Highway 7 from Lafayette to Broomfield (same roadway for 7 miles) * I-25 in northern Broomfield *
US 85 U.S. Route 85 (US 85) is a north–south United States Highway that travels in the Mountain and Northern Plains states of the United States. The southern terminus of the highway is at the Mexican border in El Paso, Texas, connecting wi ...
in
Brighton Brighton () is a seaside resort and one of the two main areas of the City of Brighton and Hove in the county of East Sussex, England. It is located south of London. Archaeological evidence of settlement in the area dates back to the Bronze A ...
*
I-76 Interstate 76 may refer to: Interstate Highways in the United States * Interstate 76 (Colorado–Nebraska) * Interstate 76 (Ohio–New Jersey), running through Pennsylvania Video gaming * ''Interstate '76 ''Interstate '76'' is a vehicular c ...
in Lochbuie


Termini

*Western terminus: *Eastern terminus: {{Coord, 40, 00, 02, N, 104, 36, 11, W, format=dms, display=inline, type:landmark_region:US-CO


External links


pictures of The Colorado Chautauqua and Sunrise Amphitheatre

map: western terminus, Flagstaff Mountain

map: Erie Municipal Airport

map: I-25 interchange

map: eastern terminus, 16800 Watkins Road
Streets in Colorado Boulder, Colorado Transportation in Boulder County, Colorado Transportation in Broomfield County, Colorado Transportation in Adams County, Colorado Transportation in Weld County, Colorado