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San Diego County Route S12, also known as Palomar Airport Road, San Marcos Boulevard, Twin Oaks Valley Road, and Deer Springs Road, runs through North County in San Diego.
[edit] Route description
S12's western terminus is at Carlsbad Blvd in Carlsbad. Almost immediately after it begins, S12 (this portion of which is called "Palomar Airport Rd") intersects with Interstate 5. It continues eastward, passing its namesake, McClellan-Palomar Airport. It intersects with El Camino Real and eventually enters San Marcos, where it is renamed San Marcos Blvd after an intersection with Business Park Dr. San Marcos Blvd intersects Rancho Santa Fe Rd and continues eastward, crossing State Route 78. Shortly thereafter, San Marcos Blvd intersects with Twin Oaks Valley Road, which bears the S12 designation after this junction. A block after becoming S12, Twin Oaks Valley Rd intersects with Mission Rd, then continues to the northern borders of San Marcos. Curiously, at the edge of the city, the road's name changes to Deer Springs Rd at an intersection with another Twin Oaks Valley Rd. Deer Springs Rd continues northward through unincorporated land. Eventually the road turns east, and S12 ends at an interchange with Interstate 15, though the road itself continues as Mountain Meadow Rd through Hidden Meadows.
[edit] Landmarks and attractions
[edit] External link
Carlsbad Blvd in Carlsbad
Interstate 5 in Carlsbad
El Camino Real in Carlsbad
Rancho Santa Fe Rd in San Marcos
CA-78 in San Marcos
Mission Rd in San Marcos
Interstate 15 near Hidden Meadows
