County Route S21 (California)

Infobox road
state=CA
type=CR
route=S21
marker_

alternate_name=Torrey Pines Road, Camino Del Mar, Carlsbad Boulevard, Coast Highway
maint=


length_mi=24.74
length_round=2
length_ref=cite web|author=Faigin, Daniel P|url=http://cahighways.org/countys.html#S21|title=County Routes "S" - County Route S21|publisher=www.cahighways.org|accessdate=2008-07-27]
established=1968
direction_a=South
terminus_a=Genesse Avenue near Del Mar
junction=
direction_b=North
terminus_b=jct|state=CA|I|5 in Oceanside

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.

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.

Points of interest

*Torrey Pines Golf Course
*Del Mar Racetrack, home to horseracing and sight of several races involving the well known horse Seabiscuit.
*Carlsbad State Beach
*Cardiff State Beach in Cardiff by the Sea.
*Camp Pendelton