County Route S21 (California)

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County Route S21
San Diego County Route S21
Genesse Ave/Camino Del Mar/Coast Highway/Carlsbad Blvd
Length 24.74 miles
Direction South/North
From Interstate 5 in San Diego
Major junctions Torrey Pines Road
To Interstate 5 in Oceanside
Major cities San Diego, Del Mar, Solana Beach, Encinitas, Carlsbad, Oceanside
Established 1968
System California County Routes

County Route S21 is a south-north running road serving the coastal communities of northern San Diego County, running from San Diego in the south to Oceanside in the north. The route is signed in many places as "Historic Route 101" with the official Historic U.S. 101 shields. S21 follows the prior alignment of U.S. Route 101 through this region. The route is also called "Coast Highway" in some places as well. This route was originally designated in 1968 and is 24.74 miles long.


[edit] Route description

County Route S21 begins at Interstate 5 in the north of San Diego as Genesse Avenue. The road then travels north into Del Mar it is called "Camino Del Mar". While in Del Mar the route passes both the historic Del Mar Racetrack and through the historic downtown of Del Mar. In Solana Beach the route moves closer to the coast. Along this stretch it is named "Highway 101" and the city has signed the route along its length with faux U.S. Highway shields that resemble the official U.S. 101 shields in use today along with the state issued Historic 101 shield. While to the north in Encinitas the route's name becomes "Coast Highway 101" also in homage to the old U.S. Route. In Carlsbad it becomes "Carlsbad Blvd". The route is named "Coast Highway" in Oceanside, and comes to an end at Interstate 5 in Camp Pendleton.

The section of this road between La Costa and Palomar Airport Road was once known as the Carlsbad Freeway. The majority of the route from the Del Mar city limit to Hill Street in Oceanside are signed as Historic U.S. 101 and is also an unsigned Business Route Interstate 5.

[edit] Points of interest

S21 at Carmel Valley Road in Del Mar.
S21 at Carmel Valley Road in Del Mar.
 San Diego County Routes S1 · S2 · S3 · S4 · S5 · S6 · S7 · S8 · S9 · S10 · S11 · S12 · S13 · S14 · S15 · S16 · S17 · S21 · S22