| State Route 175 | ||||
|---|---|---|---|---|
| Route information | ||||
| Defined by S&HC § 475 | ||||
| Maintained by Caltrans | ||||
| Length: | 37.89 mi[1] (60.98 km) | |||
| Major junctions | ||||
| West end: | US 101 at Hopland | |||
| SR 29 near Lakeport | ||||
| East end: | SR 29 at Middletown | |||
| Highway system | ||||
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State highways in California(list • pre-1964)
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State Route 175 is a state highway in California, USA.
Contents |
CA Route 175 connects U.S. Route 101 at Hopland to State Route 29 near Lakeport through the Mayacamas Mountains. From there it joins Route 29 until Kelseyville, where it loops out until meeting Route 29 again at its end at Middletown. The section between Hopland and Lakeport is also known locally as the "Hopland Grade", or "Hopland Pass."
Originally constructed in the early 1920s, it is one of the steepest and most difficult to drive of any California state highway. Indeed, until recently it was called the "crookedest road in California". Vehicles more than 39 feet (12 m) in length are banned from the Hopland Grade, due to its many tight hairpin turns and curves.
| County | Location | Postmile [2][3][4] |
Destinations | Notes |
|---|---|---|---|---|
| Mendocino MEN 0.00-9.85 |
Hopland | 0.00 | US 101 – Ukiah, Santa Rosa | |
| Lake LAK 0.00-28.04 |
R8.19 R40.14[N 1] |
SR 29 north / South Main Street – Lakeport | West end of SR 29 overlap | |
| 31.05[N 1] 8.25 |
SR 29 south – Lower Lake | East end of SR 29 overlap | ||
| Middletown | 28.04 | SR 29 (Calistoga Road) / Main Street – Lower Lake, Calistoga | ||
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus • Closed/Former • Incomplete access • Unopened |
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