A uniform numbering system has been adopted to uniquely identify county routes across the state of California. Within this system, each route designation has a letter and number combination. The first digit is a letter, and the second and third digits are numbers. The lower letters are generally to the north of the state, and the higher numbers are generally located in the southern part of the state. The lowest route is Lassen County Route A-1, and the highest route is Imperial County Route S-80.
County Route Group S -- along with Groups N, P, and R -- are in the Southern California group of counties: Imperial, Inyo, Los Angeles, Mono, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, and Ventura. The letters O and Q are omitted, and county routes in Group P have not been assigned.
San Diego County Route S-6/Via de la Valle, Del Dios Highway, Valley Parkway, and South Grade Road
San Diego County Route S-6 west (south)
In downtown Escondido, westbound San Diego County Route S-6 follows Valley Boulevard, while eastbound San Diego County Route S-6 follows 2nd Avenue (two blocks south of Valley Boulevard). In between the two directions of S-6 is Grand Avenue, which passes through a shopping strip in the center of downtown. Here, County Route S-6 reaches Escondido Boulevard. The California Center for the Arts - Escondido is located at the northeastern corner of this intersection. Photo taken 04/23/05.
Use northbound Business Loop I-15 to reach California 78/Ronald Packard Freeway west to Vista, San Marcos, and Oceanside. Photo taken 04/23/05.
Use northbound Business Loop I-15 to reach California 78/Ronald Packard Freeway west to Vista, San Marcos, and Oceanside. Photo taken 04/23/05.
Use northbound Business Loop I-15 to reach California 78/Ronald Packard Freeway west to Vista, San Marcos, and Oceanside. Photo taken 04/23/05.
San Diego County Route S-6 east (north)
San Diego County Route S-6 takes a slightly jagged route through downtown Escondido. This photo shows eastbound San Diego County Route S-6 at Rose Street in Escondido. Photo taken 05/20/02.
Northbound San Diego County Route S-6 at the foot of Palomar Mountain. Although there is no snow at this lower elevation, there was snow on top of the mountain on this day. Photo taken 01/02.
Northbound San Diego County Route S-6 along Valley Center Road between Escondido and Junction California 76. Palomar Mountain looms in the background. Photos taken 05/20/02.
Northbound San Diego County Route S-6 approaches its junction with San Diego County Route S-7. San Diego County Route S-7 leads east toward Lake Henshaw and west toward Palomar Mountain State Park after a very brief overlap with S-6. San Diego County Route S-6 continues straight ahead toward the Palomar Observatory, where S-6 ends at a parking lot for the observatory. Photos taken 01/02.
Close-up of the San Diego County Route S-6 shield as seen at the intersection with County Route S-7 on Palomar Mountain. Photo taken 07/24/02.
This picture shows eastbound (northbound) San Diego County Route S-6 after the Palomar Mountain general store and restaurant. The highway continues to the observatory. Note the snow along the rights of way. Photos taken 01/02.
Northbound San Diego County Route S-6 as it approaches the Palomar Observatory (the white ball in the distance above the trees). The observatory is free to visit during business hours, and there is a display inside the observatory that explains how the equipment required for it was transported up Palomar Mountain. Photo taken 01/02.
Northbound San Diego County Route S-6 passes through some shady areas en route to the observatory, and these shady areas take longer to thaw than other areas. Ice and snow were still present on the road at the time this photo was taken, which made travel treacherous on this winter day. Photo taken 01/02.
End Northbound San Diego County Route S-6 at the entrance to the Palomar Observatory parking lot. The elevation here is 5,550 feet above sea level, the highest point along County Route S-6. Photo taken 01/02.
Scenes Pertaining to San Diego County Route S-6
These pictures show the observatory building as well as views from on top of the mountain, looking south and west. Photos taken 01/02, 05/20/02, and 07/24/02.
San Diego County Route S-7/East Grade Road
Close-up of the San Diego County Route S-7 shield as seen along northbound County Route S-6 at the intersection with County Route S-7 on Palomar Mountain. Photo taken 07/24/02.
Northbound San Diego County Route S-7 after junction San Diego County Route S-6 en route to Palomar State Park. Photo taken 01/02.
Southbound San Diego County Route S-7 approaching junction San Diego County Route S-6. County Route S-6 north leads to the Palomar Observatory (as well as the general store and restaurant); County Route S-6 south leads down the mountain to Valley Center and Junction California 76. Photo taken 01/02.
Southbound San Diego County Route S-7 descending from Palomar Mountain as it approaches junction California 76 along East Grade Road. Photo taken 01/02.
Southbound San Diego County Route S-7 ends at junction California 76 just west of Lake Henshaw. California 76 leads east to Junction California 79 and west to junction Interstate 15. Photo taken 01/02.
San Diego County Route S-8/Lomas Santa Fe Road and Linea del Cielo
