 State Route 39 | ||||
|---|---|---|---|---|
 SR 39 highlighted in red; gaps indicate the unconstructed or relinquished portions | ||||
| Route information | ||||
| Maintained byCaltrans | ||||
| Length | 54.19 mi[1] (87.21 km) SR 39 is broken into pieces due to an unconstructed portion, and the length does not reflect the gap. Also, portions of SR 39 have been relinquished to or are otherwise maintained by local or other governments, and are not included in the length. | |||
| Existed | 1934[2]–present | |||
| Restrictions | The segment from north of Crystal Lake Road to its northern terminus atSR 2 is closed indefinitely to public highway traffic | |||
| Southern segment | ||||
| South end |  SR 1 inHuntington Beach | |||
| Major intersections |
| |||
| North end | Whittier Boulevard /Harbor Boulevard inLa Habra | |||
| Northern segment | ||||
| South end |   I-10 /CR N8 inWest Covina | |||
| Major intersections |  I-210 inAzusa | |||
| North end |  SR 2 inAngeles National Forest | |||
| Location | ||||
| Country | United States | |||
| State | California | |||
| Counties | Orange,Los Angeles | |||
| Highway system | ||||
| ||||
State Route 39 (SR 39) is a state highway in theU.S. state ofCalifornia that travels throughOrange andLos Angeles counties. Its southern terminus is atPacific Coast Highway (SR 1), inHuntington Beach. SR 39's northern terminus is atIslip Saddle onAngeles Crest Highway (SR 2) in theAngeles National Forest, but its northernmost 4.5-mile (7.2 km) segment (including the connection with SR 2) has been closed to public highway traffic since 1978 due to a massive mud and rockslide.
Officially, the highway is broken into pieces. Caltrans has not adopted or signed the segment betweenLa Habra andWest Covina. Caltrans has also relinquished segments of SR 39 within the cities ofAnaheim in 2024,[3]Buena Park in 2013,Azusa by 2010,Covina by 2010, andWest Covina by 2013, although some maps and signs may still mark SR 39 as continuous through these cities. Since 2001, a portion of SR 39 that runs through the city ofStanton has also been considered for relinquishment to the city.[4]
Major places of interest along SR 39 areKnott's Berry Farm, an amusement park;Adventure City, another amusement park targeted for children; Huntington Beach, a local beach; aMedieval Times location; the Buena Park Auto Center; and the Westridge Golf Course inLa Habra.
SR 39 begins atSR 1 (Pacific Coast Highway) inHuntington Beach and runs north along Beach Boulevard toWhittier Boulevard inLa Habra, with the exception of two stretches: the segment between Stanton Avenue andInterstate 5 was relinquished to the city ofBuena Park in 2013, and the segment between theStanton–Anaheim line and Stanton Avenue was relinquished to the city of Anaheim in 2024. SR 39 briefly entersLa Mirada and Los Angeles County nearRosecrans Avenue, then goes back into Orange County at theLa Habra–La Mirada line. SR 39 then turns east along Whittier Boulevard to Harbor Boulevard, taking over a former segment ofSR 72, while the remaining segment SR 72 remains on Whittier Boulevard west of Beach Boulevard.
The segment from the Whittier–Harbor intersection to theSan Bernardino Freeway (Interstate 10) inWest Covina is not officially designated by Caltrans (as indicated by an "END 39" sign at the Whittier–Harbor intersection). UnderCalifornia Streets and Highways Code § 339 (d), the traversable route takes SR 39 along Harbor Boulevard north, Fullerton Road north, and then Colima Road west to Azusa Avenue inHacienda Heights. SR 39 would then continue north on Azusa Avenue through theCity of Industry to Interstate 10.[5][disputed –discuss]
Adopted SR 39 then resumes and signs for SR 39 appear on Azusa Avenue from its junction with Interstate 10 in West Covina, and throughCovina to First Street in the city ofAzusa just north ofInterstate 210. The route then runs as acouplet (composed of two one-way streets), with northbound traffic on Azusa Avenue, and southbound traffic on San Gabriel Avenue, to Sierra Madre Avenue where the two one-way streets converge to form San Gabriel Canyon Road. Although Caltrans relinquished the entire route in the cities of West Covina, Covina, and Azusa, SR 39 shields remain on this segment of the highway.
State maintenance of SR 39 begins again along San Gabriel Canyon Road at the north limit of Azusa. The highway winds through theSan Gabriel Mountains in theAngeles National Forest for 22.6 miles (36.4 km) until it reaches a gate barring the road 0.25 miles (0.40 km) north of Crystal Lake Road in theCrystal Lake Recreation Area. The last few miles of the route, including the connection toSR 2, are closed to public highway traffic, as the roadbed has been closed since 1978, due to major rock slides that year and again in 2005 which damaged more of the remaining roadbed.
A replacement of the section north ofEast Fork Road, in the next canyon to the east, was partly built in 1936 and 1961, but was never completed. The section includes one bridge and two tunnels; it was never used by automobile or truck traffic. In one local hiking guide the section is identified as the "Road to Nowhere" and the "Convict Road", although the official name is the Shoemaker Road and was planned to be an escape route in times of nuclear warfare.[6] A ca. 1967[7] replacement, much closer to the existing alignment, was also stopped prematurely, and so the middle of the segment between East Fork Road and the closure gate, with its manyhairpin curves, still exists.
SR 39 is part of theCalifornia Freeway and Expressway System,[8] and the urban portions of SR 39 are part of theNational Highway System,[9] a network of highways that are considered essential to the country's economy, defense, and mobility by theFederal Highway Administration.[10] SR 39 is eligible for theState Scenic Highway System,[11] but it is not officially designated as a scenic highway by theCalifornia Department of Transportation.[12]
Although defined to be a continuous route in the California Streets and Highway Code, the segment from Whittier Boulevard inLa Habra toWest Covina is not officially adopted or signed byCaltrans. This is indicated at the intersection of Whittier Boulevard and Harbor Boulevard, where an "END 39" sign appears.
Prior to the present before reaching Harbor Boulevard, SR 39 continued north from Whittier Boulevard along Hacienda Road to the Los Angeles/Orange County line then north on Hacienda Boulevard and Glendora Avenue toUS 60,70, and99 (Garvey Avenue, nowInterstate 10) in West Covina.[13] It then continued east with US 60, 70, and 99 to Azusa Avenue where it turned north to follow the present alignment as described beginning in the fourth paragraph of the preceding section. The Hacienda Glendora segment can still be seen as Route 39 on some maps.
Prior to 1991, Harbor Boulevard became Fullerton Road northbound from the Los Angeles/Orange County Line, through the Puente Hills as a one-lane winding road into Rowland Heights. However, due to complaints of nearby residents due to the increased volume of traffic, a straighter, wider stub was built slightly to the east, and was named Harbor Boulevard. This route is under consideration to become part of SR 39 to complete the gap.
The new Harbor Boulevard was opened to the public early in 1992, and is now the primary corridor between Orange County and Rowland Heights, although the original winding Fullerton Road segment still exists as a strictly residential street.[citation needed]
The definition of Route 39 in the California Streets and Highway Code was thus changed accordingly, and the traversable route to fill the Route 39 gap would be via Harbor Boulevard north, Fullerton Road north, and then Colima Road west to Azusa Avenue inHacienda Heights. Route 39 would then continue north on Azusa Avenue through theCity of Industry to Interstate 10 in West Covina.[5][14] This segment however has yet to be officially designated by Caltrans.[15]
After the road's completion, there were frequent closures along SR 39 through theSan Gabriel Valley.[16] During the winter of 1978, following a period of heavy rainfall, arockslide damaged the northernmost 4.5-mile (7.2 km) stretch of SR 39 nearCrystal Lake to the road's terminus atSR 2, atIslip Saddle. This resulted in the permanent closure of a 6.1 mi (9.8 km) portion of SR 39. In 1990,Caltrans started maintaining the damaged sections by restoringculverts and addingberms. The transit agency offered the closed portion of the road to theUnited States Forest Service, which would only accept it if the road was returned to a wild state, a proposition considered to be more costly than reconstruction. During the1997–98 El Niño event, heavy rainfall caused another rockslide that damaged sections still under construction. Following a Caltrans study, which determined that the road's reopening would not harm the environment, the closed portion was reopened as aservice road and emergency route in February 2003. In June 2006, California authorized funding to conduct a three-year-longenvironmental impact report. It was predicted that a reopened SR 39 would reduce travel time by around 50% betweenMount Waterman andPasadena, shortening the drive from about two hours to one. According to Caltrans, work could begin in 2009 on reconstruction, as well as the installation of safety features to prevent future slides from damaging the roadway.[16][17][18][19]
The environmental impact statement was completed in 2009, estimating the project's cost at $32 million (over $45 million in 2023, adjusted for inflation).[20] After the report was released,California Fish and Wildlife informed Caltrans that the road's reconstruction would negatively affect the subspecies ofbighorn sheep, theNelson's bighorn sheep, a protected species in the state. In September 2011, Caltrans canceled plans to reopen the closed portion of SR 39. By that time, the maintenance cost for that portion of the road was $1.3 million per year.[16] Thereafter, the agency tried to transfer responsibility for the entirety of SR 39 north of postmile LA 17.81 (including the closed section) to either theU.S. Forest Service orLos Angeles County, both of which declined for financial reasons, even though both the USFS and the county deemed the route "essential". Abandoning the route would not be cost-effective for Caltrans due to, among other reasons, federal environmental restoration requirements related to the presence of bighorn sheep.[21] The proposal was abandoned after opposition by local residents and the county, as well as substantial legal pressure by the Forest Service, who threatened to enforce an old contract that requires Caltrans to completely deconstruct the highway should it refuse to maintain it.[21] After lobbying from the cities ofAzusa andGlendora, and support from congresswomanGrace Napolitano, Caltrans restarted plans in 2011 toward reopening the closed section of SR 39. Benefits for the project included another evacuation route for Azusa.[22] On December 15, 2022, Caltrans held a meeting to consider several proposed plans to reopen SR 39. Proposals include a full restoration, minimal restoration for emergency services, a single-lane road, or recreational use. Under the recreational use proposal, the restored route would be closed to general traffic, but would allow for hiking, biking, and other recreational activities.[23]
Except where prefixed with a letter,postmiles were measured on the road as it was in1964, 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, seeCalifornia postmile § Official postmile definitions).[1] 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.
| County | Location | Postmile [1][7][24][25][14] | Destinations | Notes | |
|---|---|---|---|---|---|
| Orange ORA 0.00-17.26 | Huntington Beach | 0.00 | SR 1 (Pacific Coast Highway) –Long Beach,Newport Beach | Southern terminus; formerUS 101 Alt. | |
| Huntington Beach–Westminster line | 5.80 |  I-405 (San Diego Freeway) –Long Beach,Irvine,San Diego | I-405 exit 16; formerSR 7 | ||
| Westminster | 8.48 |  SR 22 (Garden Grove Freeway) –Long Beach,Santa Ana,Orange | SR 22 exit 8 | ||
| Stanton–Anaheim line | 11.6 | North end of state maintenance | |||
| Anaheim | 12.71 | Lincoln Avenue | FormerSR 214 | ||
| Buena Park | 14.38 |  SR 91 (Artesia Freeway) –Riverside,Artesia,Beach Cities | SR 91 exit 23B | ||
| 15.07 |  I-5 (Santa Ana Freeway) –Los Angeles,Santa Ana,San Diego | Interchange; south end of state maintenance; I-5 exit 116; access to and from northbound I-5 via Auto Center Drive | |||
| 15.08 | Auto Center Drive | Formerly Manchester Avenue and formerSR 10[26] | |||
| 15.57 |   ToI-5 north /Artesia Boulevard | Alternate southbound access to I-5 north via Artesia Boulevard west[27] | |||
| 15.63 | Stage Road / Cascade Way | Stage Road was formerlySR 26 | |||
| 16.38 | La Mirada Boulevard (CR N8) / Malvern Avenue | Southern terminus of Los Angeles County Route N8 | |||
| Los Angeles LA D17.26-D18.44 | La Mirada | D17.34 | Rosecrans Avenue | ||
| Orange ORA 18.44-22.66 | La Habra | 19.17 |   SR 90 east (Imperial Highway) –Brea,Yorba Linda | Western terminus ofSR 90; Imperial Highway was former SR 90 west before being relinquished to local jurisdictions | |
| 20.72 |   SR 72 north (Whittier Boulevard) –Whittier | FormerUS 101; Whittier Boulevard was former SR 72 south before being relinquished to local jurisdictions | |||
| 22.66 0[N 1] | Whittier Boulevard east /Harbor Boulevard south | North end of Orange County segment, as adopted and signed byCaltrans;[5][disputed –discuss] formerUS 101 south; former SR 72 south | |||
| Los Angeles LA 10.70-44.40 | Rowland Heights | 4.0[N 1] | Fullerton Road north / Colima Road east | [disputed –discuss] | |
| Hacienda Heights–City of Industry line | 5.5[N 1] | Colima Road west (CR N8) / Azusa Avenue south | South end of CR N8 overlap | ||
| City of Industry | 5.9[N 1] |  SR 60 (Pomona Freeway) –Los Angeles,Pomona | SR 60 exit18 | ||
| 6.8[N 1] | Chestnut Street | Interchange; northbound exit and entrance only | |||
| 6.9[N 1] | Valley Boulevard | Interchange; access via connector roads | |||
| South San Jose Hills–Valinda– West Covina tripoint | 8.1[N 1] | Temple Avenue | North end of state control, as defined byStreets and Highways Code § 339 (d)[5] | ||
| West Covina | 11.5[N 1] 10.71 | CR N8 ends | South end of Los Angeles County segment, as adopted and signed byCaltrans;[5][disputed –discuss]; north end of CR N8 overlap; I-10 exit 36; formerUS 99 | ||
| I-10 (San Bernardino Freeway) –Los Angeles,San Bernardino | |||||
| Azusa | 14.05 | I-210 (Foothill Freeway) –Pasadena,San Bernardino | I-210 exit 40 | ||
| 17.81 | Bridge overSan Gabriel River South end of state maintenance | ||||
| | 39.90 | Northbound road closure gate | |||
| Islip Saddle | 44.40 | SR 2 (Angeles Crest Highway) –La Cañada Flintridge,Wrightwood | Closed; northern terminus | ||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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