County Highway S6 January 9, 2003 - Philip J. Erdelsky, pje@efgh.com

County Highway S6 begins at the intersection of Via De La Valle and Highway 101 in Solana Beach, just northwest of the Del Mar Racetrack. It runs east and north for over fifty miles, passing through Escondido and Valley Center. It then climbs the south side of Mount Palomar and turns west near the summit, coming to an end at the visitors' parking lot for Palomar Observatory. It gains almost exactly one mile in altitude and passes through some of the most scenic parts of San Diego County.

County Highway S6 has mile markers every mile, or in some cases every half-mile, in rural areas. The markers show mileages quite close to those in the table below.

The following table lists the major intersections and landmarks on County Highway S6:

miles from west end	left (for eastbound traveler)	control	right (for eastbound traveler)	remarks
0.0	Highway 101	traffic light	Highway 101	County Highway S6 begins
0.7	Valley Ave	traffic light	Jimmy Durante Blvd
0.9	Interstate 5 NORTH	interchange, traffic lights	Interstate 5 SOUTH
1.2	San Andres Dr	traffic light	San Andres Dr
2.3		traffic light	El Camino Real
2.5	El Camino Real	traffic light
3.7			Cancha De Golf
4.8	Calzada Del Bosque	traffic light	Calzada Del Bosque
5.6			Via De Santa Fe
5.7	Via De Santa Fe
6.2	County Highway S8 WEST, Paseo Delicias	4-way stop	County Highway S6 EAST, Paseo Delicias
6.9	El Montevideo	4-way stop	La Valle Plateada
7.5	El Camino Del Norte
8.8		traffic light	Bing Crosby Blvd
9.1	Calle Ambiente	traffic light
11.0			Lake Hodges Dam (see photograph)
12.4			Rancho Drive
12.5	Mount Israel Rd
14.0			Date Lane
14.5		traffic light	Via Rancho Pkwy
15.1	Citracado Pkwy	traffic light	Citracado Pkwy
15.9	Eleventh Ave	traffic light	Eleventh Ave
16.1	Ninth Ave	traffic light	Ninth Ave
16.3	Auto Park Way	traffic light	Auto Park Way
16.6	Interstate 15 NORTH	interchange, traffic lights	Interstate 15 SOUTH
16.8	Tulip St	traffic light	separate from westbound County Highway S6
17.1		railroad grade crossing
17.2	Quince St	traffic light	Quince St
17.4	Centre City Pkwy	traffic light	Centre City Pkwy
17.5	Escondido Blvd	traffic light	Escondido Blvd
17.7	Broadway	traffic light	Broadway
18.1	Grand Ave	traffic light	Grand Ave
18.2	Hickory St	traffic light
18.4	Fig St	traffic light	Fig St
18.8	California Highway 78 WEST, Ash St	traffic light	California Highway 78 EAST, Ash St
19.0	Harding St	traffic light	Harding St
19.3	Rose St	traffic light	Rose St
19.8	Midway Dr	traffic light	Midway Dr
20.3	Citrus Ave	traffic light	Citrus Ave
20.8			Bear Valley Pkwy
21.2	Washington Ave	traffic light	Hidden Trails Rd
22.0		traffic light	Lake Wohlford Rd
25.5			Woods Valley Rd
26.7	Lilac Rd	traffic light
27.5	Miller Rd
28.0	Cole Grade Rd	traffic light
31.0	Thundernut Lane		N Lake Wohlford Rd
32.5		cattle guard
34.1				San Luis Rey River
34.3	Harrah's Casino and Resort	traffic light
35.6		cattle guard
35.9	California Highway 76 WEST	stop (eastbound only)	County Highway S6 EAST, California Highway 76 EAST
40.9	County Highway S6 EAST, South Grade Road	yield (westbound only)	Calle El Potrero
41.3		cattle guard
41.7		cattle guard
42.9		cattle guard
47.8	County Highway S6 EAST, County Highway S7 WEST, Canfield Rd	yield (eastbound only)	County Highway S7 WEST, East Grade Rd
47.9	County Highway S7, State Park Rd
49.3		cattle guard
50.2			Observatory Campground
50.4	Fry Creek Campground
51.4		cattle guard
52.3				County Highway S6 ends (see photograph)

NOTE: Between Tulip St. and Hickory St. in Escondido, County Highway S6 splits into two parts. Eastbound County Highway S6 runs along Grand Ave., 2nd Ave. and S. Valley Blvd., while westbound County Highway S6 stays on Valley Pkwy.