California State Route 58

Spring Wildflowers off SR 58 near California Valley, CA, 2010

State Route 58 between Santa Margarita and Buttonwillow is a winding mountain road through a thinly populated area. From its westernmost terminus at US 101 near Santa Margarita, a few miles north of San Luis Obispo, SR 58 heads east along the former US 101 (El Camino Real) for one mile. SR 58 then heads east and up the winding mountain road, passing through a thinly populated area and an intersection with SR 229. Alternatives such as SR 46 to the north or SR 166 to the south are recommended, as much of this section of SR 58 is prohibited to truck traffic. However, this section of SR 58 does pass through the Carrizo Plain, which is known for its scenic beauty and geological features, including the San Andreas Fault. SR 58 then takes another winding road before joining with State Route 33 (SR 33) in the small town of McKittrick. SR 33 then splits at the north end of McKittrick before SR 58 then enters another, but brief winding road. SR 58 then proceeds northeast for several miles before changing to an east-west alignment and reaching Buttonwillow. A few miles later, SR 58 has an interchange with Interstate 5 (I-5).

Starting in late 2022, while the Westside Parkway and the Centennial Corridor Project nears completion by late 2023 (see below), signs have been installed piece-by-piece rerouting SR 58 traffic between I-5 and State Route 99 in Bakersfield onto a new alignment. Under the older alignment, SR 58 continues due east from I-5, briefly joining SR 43, before eventually reaching the Bakersfield city limits. SR 58 then joins SR 99 for about 2 miles (3.2 km) through Bakersfield before splitting as a freeway at the West Bakersfield Interchange. Under the new alignment, SR 58 joins I-5 south to Stockdale Highway, where it then heads east and intersects with SR 43 before reaching Bakersfield. In Bakersfield, the route follows the Westside Parkway, a freeway built by the city. While the connection from Westside Parkway to the West Bakersfield Interchange remains under construction, SR 58 traffic is temporarily rerouted onto Mohawk Street and then back onto its older alignment before reaching SR 99.

East of SR 99, SR 58 then briefly enters expressway status with two at-grade intersections in the Caliente area before resuming freeway status east of Caliente. SR 58 then reaches the Tehachapi city limits and traverses the Tehachapi Pass before dropping out of the Tehachapi Mountains into the Antelope Valley at the town of Mojave. Freeway conditions continue from State Route 14 east of Mojave bypassing North Edwards, Edwards Air Force Base, Boron, and Kramer Junction. Approximately 10 miles (16 km) east of an interchange with U.S. Route 395, SR 58 resumes expressway status with two lanes in each direction until just before reaching the easternmost terminus at Interstate 15 in Barstow.

With the lack of four-lane or greater, divided highways that cross the Sierra Nevada between SR 58 at the Tehachapi Pass and Interstate 80 at Donner Summit about hundreds of miles to the north, I-5 and SR 58 are used by motorists to travel between Northern California and points to the southeast, such as Las Vegas (via I-15) and Interstate 40, without having to face the extreme traffic congestion of greater Los Angeles.

SR 58 is part of the California Freeway and Expressway System,[2] and east of I-5 is part of the National Highway System,[3] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.[4] SR 58 is eligible for the State Scenic Highway System,[5] but it is not officially designated as a scenic highway by the California Department of Transportation.[6] SR 58 has several names throughout its length, including the Blue Star Memorial Highway (for its entire length); the Kern County Korean War Veterans Memorial Highway, for the section from SR 184 to the Kern County/San Bernardino County Line; and the Rosa Parks Highway, for the section between SR 99 and SR 184. The Korean War Veterans name honors the approximately 8,120 veterans from Kern County, while the section named for Rosa Parks honors the civil rights activist.[7] The portion of SR 58 from Barstow to Bakersfield is sometimes referred to as the Barstow–Bakersfield Highway.[8]

Westbound SR 58 in the Temblor Range, descending into the Carrizo Plain

A truck passes eastbound along the busy SR 58 through the Antelope Valley. The Tehachapi Mountains are visible in the distance.

State Route 58 did not exist as a California sign route until 1964, although previous to 1964, it was part of California Legislative Route 58. The other part of Legislative Route 58 is California's segment of Interstate 40; previous to 1964 it was a segment of US 66.

Prior to 1964, the segment of State Route 58 between Bakersfield and Barstow was signed U.S. Route 466. Also at that time, the segment of SR 58 between State Route 33 at McKittrick and State Route 99 in Bakersfield was signed as State Route 178. Although it was proposed for signing as Route 178 in 1934, the segment of Legislative Route 58 between US 101 near Santa Margarita and State Route 33 at McKittrick was not signed prior to 1964.

Note that US 466 was co-signed with US 99, now State Route 99, between Bakersfield and Famoso Junction. Between Famoso and US 101 at Paso Robles, US 466 largely became SR 46.

The eastern terminus was originally at I-15 in northeastern Barstow. SR 58 was rerouted to I-15 in Barstow south of the I-40 interchange in c. 2000. The former eastern terminus is now known as "Old Highway 58".

Freeway bypasses in Tehachapi, Boron, Mojave, Hinkley, and Kramer Junction were completed in c. 1975, 1981, 2003, 2017, and 2020, respectively.

In western Bakersfield, the Westside Parkway, a freeway running from Stockdale Highway (near Heath Road) east to Truxtun Avenue, was completed on April 15, 2015, with interchanges in between at Allen Road, Calloway Drive, Coffee Road, and Mohawk Street.[9] Opening in stages since 2013, the road was originally under the jurisdiction of the city of Bakersfield. As part of the Centennial Corridor project, Caltrans is building an eastern extension of the Westside Parkway to the current junction of SR 58 and SR 99 at the West Bakersfield Interchange. Although construction was controversial since it displaced dozens of homes and businesses,[10] by September 2017, all but a few buildings in the path had been demolished.[11]

On February 5, 2021, the city transferred the Westside Parkway to Caltrans and California Highway Patrol jurisdiction.[12] City officials then announced in October 2022 that the project was nearly complete, and that they were working on the last 800 feet of the connection, specifically, the northbound SR 99 to westbound Westside Parkway transition ramp, with an estimated 8 months of construction left.[13] Meanwhile, Caltrans began installing signage rerouting SR 58 traffic from I-5 onto Stockdale Highway and the Westside Parkway east to at least Mohawk Street.[14][15][16] The connection to SR 99 is then scheduled completed in fall 2023, and the rest of SR 58 running on Rosedale Highway between Mohawk Street and SR 99 will then be transferred onto the completed ramps.[17][18]

Future plans are to upgrade Stockdale Highway from I-5 to Heath Road as a freeway.[19]

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 to an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see California postmile § Official postmile definitions).[20] 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.

Exits on the Westside Parkway segment are currently unnumbered.

County	Location	Postmile [20][1][21]	Exit [22][23]	Destinations	Notes
San Luis Obispo SLO 0.00-57.15	​	0.00		US 101 – San Francisco, San Luis Obispo, Los Angeles	Interchange; western terminus; US 101 exit 211
	​	6.89		SR 229 north – Creston, Shandon	Southern terminus of SR 229
	​	45.20		Soda Lake Road – California Valley, Soda Lake	Serves Carrizo Plain National Monument
Kern KER 0.00-R143.86	McKittrick	15.41 33.45[N 1]		SR 33 south – Taft	West end of SR 33 overlap
		34.29[N 1] 15.42		SR 33 north – Coalinga	East end of SR 33 overlap
	Buttonwillow	27.28		Buttonwillow Drive to I-5 north
		31.64		I-5 north (West Side Freeway) / Hageman Road – Sacramento	Interchange; west end of I-5 overlap; I-5 south exit 257; Hageman Road is former SR 58 east
		​	West end of freeway on I-5
	​	​	East end of freeway on I-5
		​		I-5 south (West Side Freeway) / Stockdale Highway west – Los Angeles	Interchange; east end of I-5 overlap; I-5 north exit 253
	Rosedale	​		SR 43 (Enos Lane) to I-5 south – Shafter	Roundabout
		​		Stockdale Highway east	At-grade intersection; serves California State University, Bakersfield
		​	West end of freeway and Westside Parkway
	Bakersfield	​		Allen Road
		​		Calloway Drive	Signed as separate north and south exits westbound
		​		Coffee Road
		​	East end of freeway on Westside Parkway
		​		Westside Parkway east to Truxtun Avenue east, Mohawk Street south	Interchange; no access from Westside Parkway west to Mohawk Street; SR 58 east temporarily exits and follows Mohawk Street northbound; Westside Parkway east is future SR 58 east
		​		Rosedale Highway, Mohawk Street north	SR 58 west temporarily follows Mohawk Street southbound; Rosedale Highway west is former SR 58 west
		51.81 25.65[N 2]		SR 99 north / SR 178 east (24th Street) – Fresno, Sacramento, Downtown Bakersfield	Interchange; west end of SR 99 overlap; SR 99 south exit 26; western terminus of SR 178
		​	West end of freeway
		24.60[N 2]	25	California Avenue – Civic Center	Exit number follows SR 99
		T52.14– R52.36	110A	SR 99 south – Los Angeles	East end of SR 99 overlap; SR 58 west currently follows exit 110B / SR 99 north; West Bakersfield Interchange; left exit westbound; SR 99 exit 24
		T52.14– R52.36		SR 58 west (Westside Parkway)	Under construction; scheduled to open in fall 2023
		T52.14– R52.36		Real Road	Closed; former westbound exit and eastbound entrance; demolished during the Westside Parkway extension construction
		23.62[N 2]		Stockdale Highway, Brundage Lane	Eastbound exit only
		R53.39– R53.52	111	Chester Avenue, H Street
		R54.42	112	SR 204 north (Union Avenue)	Former US 99; southern terminus of SR 204
		R55.40	113	Martin Luther King Jr. Boulevard	Formerly Cottonwood Road[24]
		R56.41	114	Mount Vernon Avenue
		R57.41	115	Oswell Street
	​	R58.44	116	Fairfax Road
	​	R59.44	117	SR 184 (Weedpatch Highway, Morning Drive) – Lamont	Weedpatch Highway not signed westbound, Morning Drive not signed eastbound
	Edison	R61.51	119	Edison Road – Edison
	​	R63.58	121	Comanche Drive – Arvin, Edison
	​	R65.68	123	Tower Line Road
	​	69.75	127	General Beale Road
	​	​	East end of freeway
	​	75.63		SR 223 west – Arvin	At-grade intersection; eastern terminus of SR 223
	​	​	West end of freeway
	Keene	80.24	137	Hart Flat Road
		82.06	139	Keene (Woodford-Tehachapi Road)
		R85.15	142	Broome Road
	Tehachapi	R90.72	148	SR 202 west (Tucker Road) – Tehachapi	Eastern terminus of SR 202
		R91.67	149	Mill Street
		R94.15[25]	Tehachapi Summit, elevation 4,064 feet (1,239 m)[25]
		R94.16	151	Tehachapi Boulevard
	​	R99.49	156	Sand Canyon Road – Monolith
	​	R101.56	159	Cameron Road	Pacific Crest Trail crossing
	​	R108.90	165	SR 58 Bus. east – Mojave	Former US 466 east / SR 58 east
	​	R111.13	167	SR 14 – Bishop, Mojave	Former US 6
	​	R116.22	172	SR 58 Bus. west – Mojave	Former US 466 west / SR 58 west
	​	​		25th Street	At-grade intersection; east end of freeway
	​	R127.63		California City Boulevard – California City	At-grade intersection; west end of freeway
	​	R129.67	186	Edwards AFB (Rosamond Boulevard north gate)
	North Edwards	R132.04	188	Clay Mine Road
	​	R136.40	193	Twenty Mule Team Road	Former US 466 east
	​	R137.77	194	Gephart Road, Rocket Site Road
	​	R139.00	Boron Rest Area
	Boron	R139.80	196	Borax Road (SR 58 Bus. east), Rocket Site Road
		R142.87	199	Boron Avenue
San Bernardino SBD R0.00-R34.81	Kramer Junction	R5.40	206	US 395 – Bishop, San Bernardino
	​	​	East end of freeway
	​	​	West end of freeway
	Hinkley	R26.33	227	Hinkley Road
	​	R30.39	231	Lenwood Road
	Barstow	R33.65	233	CR 66 (West Main Street) – Barstow	Former US 66 / US 91
		R34.81	234	I-15 (Mojave Freeway) to I-40 – Las Vegas, San Bernardino	Eastern terminus; exit 234 is for I-15 southbound; I-15 exit 179
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access       Unopened

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Wikimedia Commons has media related to California State Route 58.

• Caltrans: State Route 58 highway conditions
• Caltrans Traffic Conditions Map
• California Highway Patrol Traffic Incidents
• California Highways State Route 58
• California @ AARoads.com - State Route 58