California State Route 140
|Defined by S&HC § 440|
|Maintained by Caltrans|
|Length:||101.645 mi (163.582 km)
SR 140 is broken into pieces, and the length does not reflect the overlaps that would be required to make the route continuous.
|West end:||I‑5 near Gustine|
| SR 99 in Merced
SR 49 in Mariposa
|East end:||Yosemite National Park|
State Route 140 (SR 140) is a state highway in the U.S. state of California, 102 miles (164 km) in length. It begins in the San Joaquin Valley at Interstate 5 near Gustine, and runs east into Sierra Nevada, terminating in Yosemite National Park.
In June 2006, the road between El Portal and Mariposa was closed due to a rock slide. The Ferguson Slide buried about 600 feet (180 m) of SR140 between Cedar Lodge and Briceburg Visitor Center between SR-49 and SR-41.
Though a detour opened in August, 2006, those anticipating travel between Mariposa and El Portal (Yosemite National Park) on SR140 are still advised to contact the National Park Service, California Highway Patrol, Caltrans, or the Mariposa County Sheriff to find out if the road is open.
SR 140 is part of the California Freeway and Expressway System and is eligible for the State Scenic Highway System. However, only the part of the road from Mariposa to El Portal is designated as a scenic highway.
Heading east from I-5, the highway passes Gustine; it then jogs to cross the San Joaquin River. It roughly marks the southern edge of the farmable land around Livingston. It crosses State Route 99 at Merced. Visitors who travel from the Bay Area or northern California to Yosemite Valley or the southern portion of Yosemite will transfer from Highway 99 to Highway 140 at this point. (Those who visit the northern portion of Yosemite would have taken either State Route 120 east at Manteca, or State Route 132 east at Modesto.)
The highway continues through Planada, after which the farmland gives way to grazing land. It is quite dry in the summer due to California's Mediterranean climate, and the dry grass gives the landscape a golden color. Western meadowlarks, American kestrels, red-tailed hawks and turkey vultures are frequently glimpsed. A few blue oaks can be seen as the highway leaves the valley and begins to climb through the foothills of the Sierra Nevada. They become more and more numerous as the elevation increases. As the highway passes through Catheys Valley the vegetation begins to diversify a little. California live oaks and ponderosa pines intermingle with the blue oaks as it nears Mariposa.
A ponderosa pine forest borders the highway on both sides as it passes through Midpines. As it approaches Briceburg, the roadway follows a steep, winding grade down to the Merced River valley. The highway then runs alongside the Merced River for 20 miles to the park entrance, after passing through El Portal before finally entering Yosemite Valley, where it ends. The upper stretch of the Merced River valley below the park, which the highway follows, is designated as Wild and Scenic River Area. The area separates Sierra National Forest (south) and Stanislaus National Forest (north).
Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see the list of postmile definitions). Segments that remain unconstructed or have been relinquished to local control may be omitted. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.
|Merced||0.00||Sullivan Road||Continuation beyond I-5|
|0.00||I‑5 (Westside Freeway) – Sacramento, Los Angeles||Interchange; west end of SR 140|
|Gustine||4.35||SR 33 south / Sullivan Road||West end of SR 33 overlap|
|6.06||SR 33 north / First Avenue – Newman, Tracy||East end of SR 33 overlap|
|16.22||SR 165 (Lander Avenue) – Stevinson, Hilmar, Turlock, Los Banos|
|23.43||Lincoln Boulevard – Livingston|
|29.47||Applegate Road – Atwater|
|SR 99 north / SR 59 north (V Street) – Sacramento||Interchange; west end of SR 99 / SR 59 overlap|
|West end of freeway on SR 99|
|14.69[N 1]||187B||SR 59 south (Martin Luther King Jr. Way) – Downtown Merced, Los Banos||East end of SR 59 overlap|
|14.41[N 1]||187A||G Street||Westbound exit and eastbound entrance|
|East end of freeway on SR 99|
|SR 99 south / 16th Street (SR 99 Bus. north) – Los Angeles||Interchange; east end of SR 99 overlap|
|Planada||43.70||Plainsburg Road – Le Grand, Madera, Fresno|
|Mariposa||Catheys Valley||9.50||Hornitos Road – Hornitos|
|Mariposa||21.22||SR 49 south – Oakhurst||West end of SR 49 overlap|
|22.00||SR 49 north / Jones Street – Coulterville, Sonora||East end of SR 49 overlap|
|51.80||East end of state maintenance at Yosemite National Park west boundary|
|To SR 120 (Tioga Road) – Manteca|
|SR 41 south (Wawona Road) – Wawona, Fresno||Eastbound access only|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- Indicates that the postmile represents the distance along SR 99 rather than SR 140.
- Staff. "State Truck Route List" (XLS file). California Department of Transportation. Retrieved August 21, 2012.
- "Ferguson Rock Slide". United States Department of the Interior[dead link]
- CA Codes (shc:250-257)
- CA Codes (shc:260-284)
- "Officially Designated State Scenic Highways and Historic Parkways". California Department of Transportation. September 7, 2011. Retrieved September 7, 2011.
- California Department of Transportation, Log of Bridges on State Highways, July 2007
- California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006
- California Department of Transportation, California Numbered Exit Uniform System, State Route 99 Freeway Interchanges, Retrieved on 2009-02-14.
|Wikimedia Commons has media related to California State Route 140.|
- Caltrans Route 140 Photos
- California Highways—State Route 140
- Acrobat US Forest Service file containing a map of the slide, (June 2006).
- Current Conditions - Ferguson Rock Slide, Chronology of Events