State Route 175 (SR 175) is a
state highway
A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either ''numbered'' or ''maintained'' by a sub-national state or province. A road numbered by a ...
in the
U.S. state of
California that runs through the
Mayacamas Mountains, connecting
U.S. Route 101
U.S. Route 101, or U.S. Highway 101 (US 101), is a north–south United States Numbered Highway that runs through the states of California, Oregon, and Washington, on the West Coast of the United States. It is also known as (The Royal Roa ...
in
Hopland in
Mendocino County with
State Route 29 in
Middletown in
Lake County.
Route description
SR 175 connects
U.S. Route 101
U.S. Route 101, or U.S. Highway 101 (US 101), is a north–south United States Numbered Highway that runs through the states of California, Oregon, and Washington, on the West Coast of the United States. It is also known as (The Royal Roa ...
at
Hopland to
State Route 29 near
Lakeport through the
Mayacamas Mountains. From there it joins SR 29 until
Kelseyville
Kelseyville is a census-designated place (CDP) in Lake County, California, United States. Kelseyville is located southeast of Lakeport, at an elevation of . The population was 3,353 at the 2010 census, up from 2,928 at the 2000 census.
Etymo ...
, 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.
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 turn
A hairpin turn (also hairpin bend or hairpin corner) is a bend in a road with a very acute inner angle, making it necessary for an oncoming vehicle to turn about 180° to continue on the road. It is named for its resemblance to a bent metal hai ...
s 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 condita ...
State Route 175