(a) Name. The name of the viticultural area described in this section is “San Luis Rey”. For purposes of part 4 of this chapter, “San Luis Rey” is a term of viticultural significance.

(b) Approved maps. The eight United States Geological Survey (USGS) 1:24,000 scale topographic maps used to determine the boundary of the viticultural area are as follows:

(1) Oceanside, CA, 2018;

(2) San Luis Rey, CA, 2018;

(3) San Marcos, CA, 2018;

(4) Valley Center, CA, 2018;

(5) Bonsall, CA, 2018;

(6) Temecula, CA, 2018;

(7) Fallbrook, CA, 2018; and

(8) Morro Hill, CA, 2018.

(c) Boundary. The San Luis Rey viticultural area is located in San Diego County, California. The boundary of the San Luis Rey viticultural area is described as follows:

(1) The beginning point is on the Oceanside map at the intersection of Interstate 5 and the Marine Corps Base (MCB) Camp Pendleton boundary. From the beginning point, proceed northeast for a total of 11.21 miles along the MCB Camp Pendleton boundary, crossing over the San Luis Rey map and onto the Morro Hill map, and continuing along the MCB Camp Pendleton boundary to its intersection with the Naval Weapons Station (NWS) Seal Beach Fallbrook California boundary; then

(2) Proceed east along the NWS Seal Beach Fallbrook California boundary for a total of 6.85 miles, crossing onto the Bonsall map and continuing north, then west along the boundary, and crossing back onto the Morro Hill map and continuing northerly along the boundary, crossing onto the Fallbrook map, and continuing along the boundary as it becomes concurrent with the MCB Camp Pendleton boundary, and continuing along the boundary to its intersection with De Luz Road; then

(3) Proceed east along De Luz Road for 0.38 mile to its intersection with Sandia Creek Drive; then

(4) Proceed northerly along Sandia Creek Drive for a total of 3.98 miles, crossing onto the Temecula map and continuing along Sandia Creek Drive to its intersection with an unnamed road known locally as Rock Mountain Road; then

(5) Proceed east along Rock Mountain Road for 0.21 mile to its intersection with the San Diego County line; then

(6) Proceed south then east along the San Diego County line for 6.72 miles to its intersection with an unnamed road known locally as Old Highway 395; then

(7) Proceed south along Old Highway 395 for a total of 14.9 miles, crossing onto the Bonsall map and continuing south along Old Highway 395 to its intersection with an unnamed road known locally as Old Castle Road; then

(8) Proceed east on Old Castle Road for a total of 0.59 mile, crossing onto the San Marcos map and continuing east along Old Castle Road to its intersection with Gordon Hill Road; then

(9) Proceed southeasterly along Gordon Hill Road for 0.92 mile to its intersection with the 800-foot elevation contour; then

(10) Proceed east along the 800-foot elevation contour for a total of 2.5 miles, crossing onto the Valley Center map and continuing east along the 800-foot elevation contour to its intersection with Canyon Country Lane; then

(11) Proceed northwest and then south along Canyon Country Lane for 0.83 mile to its intersection with the 1,240-foot elevation contour; then

(12) Proceed east along the 1,240-foot elevation contour for 2.90 miles to its intersection with Cougar Pass Road; then

(13) Proceed west then south along Cougar Pass Road for 0.4 mile to its intersection with Meadow Glen Way East; then

(14) Proceed south along Meadow Glen Way East for 0.46 mile to its intersection with Hidden Meadows Road; then

(15) Proceed southwest along Hidden Meadows Road for 0.73 mile to its intersection with Mountain Meadow Road; then

(16) Proceed southwest along Mountain Meadow Road for a total of 1.44 miles, crossing onto the San Marcos map and continuing along Mountain Meadow Road to the point where Mountain Meadow Road becomes known as Deer Springs Road just west of Interstate 15; then

(17) Proceed southwest along Deer Springs Road for 2.42 miles to its intersection with an unnamed road known locally as North Twin Oaks Valley Road; then

(18) Proceed south along North Twin Oaks Valley Road for 3.01 miles to its intersection with an unnamed road known locally as West Mission Road; then

(19) Proceed northwest along West Mission Road (which becomes South Santa Fe Avenue) for a total of 3.9 miles to its intersection with Robelini Drive; then

(20) Proceed southwest along Robelini Drive (which becomes Sycamore Avenue) for a total of 0.55 mile to its intersection with State Highway 78; then

(21) Proceed northwest, then westerly along State Highway 78 for a total of 9.09 miles, crossing onto the San Luis Rey map and continuing westerly along State Highway 78 to its intersection with Interstate 5; then

(22) Proceed northwest along Interstate 5 for a total of 3.14 miles, crossing onto the Oceanside map and returning to the beginning point.