State Route 175 (SR 175) is a
state highway in the
U.S. state
In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its sove ...
of
California
California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...
that runs through the
Mayacamas Mountains
The Mayacamas Mountains are located in northwestern California in the United States. The mountain range is part of the Northern Inner Coast Ranges, of the California Coast Ranges System.
Geography
The Mayacamas Mountains are located south of the ...
, connecting
U.S. Route 101 in
Hopland in
Mendocino County
Mendocino County (; ''Mendocino'', Spanish for "of Mendoza) is a county located on the North Coast of the U.S. state of California. As of the 2020 census, the population was 91,601. The county seat is Ukiah.
Mendocino County consists whol ...
with
State Route 29 in
Middletown in
Lake County.
Route description
SR 175 connects
U.S. Route 101 at
Hopland to
State Route 29 near
Lakeport through the
Mayacamas Mountains
The Mayacamas Mountains are located in northwestern California in the United States. The mountain range is part of the Northern Inner Coast Ranges, of the California Coast Ranges System.
Geography
The Mayacamas Mountains are located south of the ...
. From there it joins SR 29 until
Kelseyville, where it loops out until meeting SR 29 again at its end at
Middletown. The section between Hopland and Lakeport is also known locally as the "Hopland Grade", or "Hopland Pass."
Except for the portion on SR 29, SR 175 is not part of the
National Highway System,
a network of highways that are considered essential to the country's economy, defense, and mobility by the
Federal Highway Administration
The Federal Highway Administration (FHWA) is a division of the United States Department of Transportation that specializes in highway transportation. The agency's major activities are grouped into two programs, the Federal-aid Highway Program ...
.
History
Originally constructed in the early 1920s, it is one of the steepest and most difficult to drive of any California state highway. Until recently it was called the "crookedest road in California". Vehicles more than in length are banned from the Hopland Grade, due to its many tight
hairpin turns and curves.
Major intersections
See also
*
References
External links
{{commonscat
California @ AARoads.com - State Route 175Caltrans: Route 175 highway conditions
State Route 175
175
Year 175 ( CLXXV) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Piso and Iulianus (or, less frequently, year 928 '' Ab urbe condi ...
State Route 175