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A map of the Ridge Route drawn in 1919
The Ridge Route, officially the Castaic-Tejon Route, is a narrow two-lane highway in the northern Greater Los Angeles Area of the U.S. state of Californiamarker. Opened in 1915 and paved with concrete from 1917 to 1921, the road was the first paved highway directly linking the Los Angeles Basin with the San Joaquin Valleymarker over the Tejon Passmarker and the rugged ridge south of Gormanmarker; it was particularly used to travel from the city of Los Angelesmarker to and beyond Bakersfieldmarker. Most of the road was bypassed in 1933 by the Ridge Route Alternate (then U.S. Route 99), which has since been upgraded to a modern freeway (Interstate 5). The portion of the old road within the Angeles National Forestmarker was added to the National Register of Historic Places in 1997, and is temporarily closed pending repairs; the other remnants of the original two-lane road not destroyed by later construction are used by local traffic.


The official limits of the Ridge Route, as built in the 1910s, were State Route 126 at Castaic Junctionmarker and the bottom of the grade at Grapevinemarker. At that time, the road from San Fernandomarker to Castaic Junction passed through the Newhall Tunnelmarker at San Fernando Passmarker and ran along San Fernando Road, Magic Mountain Parkway (both part of State Route 126 until the early 2000s), and Feedmill Road to a former bridge over the Santa Clara River. A 1930 bypass of the tunnel and Newhall through Weldon Canyon is now part of The Old Road.Scott, pp. 60–61

From Castaic Junction north to Castaicmarker, the old Ridge Route has been largely buried by construction of the Ridge Route Alternate and Interstate 5. The split of the old Ridge Route and the Alternate at Castaic is now the intersection of Castaic Road and Neely Street, which dead-ends just shy of Ridge Route Road. The first piece of Ridge Route Road out of Castaic has been rebuilt and realigned as recently as the late 1990s, when the North Lake housing development was built. The road begins to climb after passing North Lake; a portion was straightened in 1924, and now lies next to the southbound lanes of I-5. In this area, known as the Five-Mile Grade, the four-lane Ridge Route Alternate was converted into the northbound lanes of I-5, while the added four-lane alignment, built to the east (next to the old Ridge Route), was built with better grades, and became the southbound (downhill) lanes to reduce issues with runaway trucks. Because traffic drives on the right side of the road in the U.S., two bridges had to be built to enable traffic to cross over to the left side. Near the north end of this area, the Ridge Route curves away from the newer bypass.

The road enters the Angeles National Forestmarker about 1 mile (2 km) south of Templin Highway, with the Forest Service road designation 8N04. A number of establishments were located in the forest, including the National Forest Inn, Kelly's Half Way Inn, Tumble Inn, and Sandberg's Summit Hotel.

Remains of the steps to the National Forest Inn
The National Forest Inn ( ) was located on the west side of the road. One of the more popular places along the route, and composed of white clapboard buildings, it was described in a 1932 highway beautification pamphlet as "the sort of filling station that gets into a national forest and is no addition thereto". On February 14, 1932, a fire began in the garage, and took over a day to put out. Due to the construction of the Ridge Route Alternate, bypassing the site to the west, the inn was not rebuilt, and all that remains are concrete steps.

Looking north through Swede's Cut
2 miles (3 km) north of the National Forest Inn is Serpentine Drive ( ), where the road curves around the sides of hills as it climbs out of a low point in the route (about above sea level). North of the curves, the road passes through Swede's Cut ( ), also called Big Cut, Culebra Excavation, or Castaic Cut. The cut was the largest on the route, with a depth of 110 feet (34 m).

Reservoir Summit ( ), also called Reservoir Hill, is 3883 feet (1184 m) above sea level. The Reservoir Summit Café was a popular high-class restaurant on the east side of the road, closed in the late 1920s; the foundation remains. The summit was named after a now-dry reservoir, one of three probably built for the concrete used in paving the road.

Kelly's Half Way Inn ( ) was roughly halfway between Los Angeles and Bakersfield - 62 and 64 mi (100 and 103 km) respectively. Located on a small knoll with a single tree on the east side of the road, all that remains is remnants of the foundation.

The Tumble Inn's step
Tumble Inn, later Mountain View Lodge ( ), was on the west side of the road, and closed when the Ridge Route Alternate opened in 1933. Steps and a retaining wall remain.

Collapsing foundation of Sandberg's Summit Hotel
Sandberg's Summit Hotel ( ), later Sandberg's Lodge, was located just north of Liebre Summit ( ), the highest point on the road, at 4170 feet (1271 m) above sea level. The hotel was built in 1914, and thus served travelers from the opening of the road in 1915. Built of log, it was a high-class hotel. The place, which had become a ceramics factory, burned down on April 29, 1961 from a fire started by the new owner — who was converting it into a "camp-type operation" for underprivileged children — burning trash in the fireplace. The lease from the U.S. Forest Service was canceled in 1963, and only portions of the foundation and a rock wall remain. The name "Sandberg" is still used by the National Weather Service for an automated weather station a short distance to the north at Pine Canyon Road. Pine Canyon Road - County Route N2 - marks the end of the forest and the beginning of county maintenance, and CR N2 uses the old Ridge Route to reach State Route 138 near Quail Lakemarker.

The Ridge Route crosses the West Branch California Aqueduct with SR 138, splitting to the northwest on Gorman Post Road. It rejoins the path of I-5 at Gormanmarker, and, from Gorman to the end at Grapevine, most of the old road has been covered over by the Ridge Route Alternate or I-5. The path of the Ridge Route is now named Peace Valley Road and Lebec Road, passing over Tejon Passmarker and past Lebecmarker and Fort Tejonmarker. Past Fort Tejon, the route descends through Grapevine Canyonmarker to Grapevine (named for grapevines in the area). The best-known curve on the road, Deadman's Curve or Death Curve ( ), is visible from Digier Road on the west side of I-5. The next part of old road to still exist is near the bottom of the grade, where a number of curves ( ) brought the road down to Grapevine. The original plan was to build the road nearer to the center of the canyon, but a March 1914 flood destroyed the work, and the grading was redone higher up. Deadman's Curve and the Grapevine loops were both bypassed by the Ridge Route Alternate, which was built directly over most of the old road in this area. At Grapevine, the land suddenly flattens out, and the road north of Grapevine was the longest straight section of road in the state - 17 miles (27 km) - in 1926. Most of this road lies under I-5 and State Route 99, but the southernmost piece in Grapevine was bypassed by the Alternate, and is now in the median of I-5.


Before the Ridge Route

The Ridge Route (red), I-5 and old US 99 (blue), and other old roads (black)
Prior to the construction of the Ridge Route, travel routes between Los Angeles and the San Joaquin Valley were a good deal longer, passing far to the east. For example, El Camino Viejo (Spanish, "the old road"), the first major road in California, connected Los Angeles and San Franciscomarker. The route had a major split at present-day Universal Citymarker, the western leg running along the Pacific Coast and the eastern leg running via the San Joaquin Valley. One of the several alternate routes between Los Angeles and Bakersfield followed the southern approach to the Ridge Route to Saugus, but took a longer route between Saugus and Gormanmarker, heading northeast through the San Francisquito Canyonmarker to the Antelope Valleymarker and west to Gorman. The rest of the route, from Gorman towards Bakersfield via the Tejon Passmarker, followed the same path as the Ridge Route.

The Butterfield Overland Stage, the first overland mail service to California, went from Tiptonmarker, Missourimarker and Memphismarker to San Francisco via Los Angeles. From October 1858, when the first stage passed through Tejon Pass, until April 1861, the route was identical to El Camino Viejo, running via San Francisquito Canyon. In order to keep the stages from running directly northwest from San Bernardinomarker and bypassing Los Angeles, the Los Angeles County Board of Supervisors spent $8000 in 1858 to deepen the cut — later Beale's Cutmarker — at San Fernando Passmarker, south of Saugus. The path followed by the stages was changed to pass along the Pacific Coast from Los Angeles in April 1861.

Similarly, the residents of the City of Los Angeles approved the expenditure of a good deal of money towards the building of the Southern Pacific Railroad, which had originally planned to bypass the city. The line to San Francisco, including the 6966-foot (2123 m) San Fernando Tunnelmarker through San Fernando Pass, was completed on September 5, 1876. The railroad's route between Saugus and Bakersfield was even longer than that of El Camino Viejo and the Butterfield Overland Stage, heading east through Soledad Canyon before turning north via Palmdalemarker to Mojavemarker and northwest over Tehachapi Passmarker.

In the 1910s, several power companies built lines through the area. The General Pipe Line Company completed an oil pipeline connecting the San Joaquin Valley's Midway-Sunset Oil Field with the port at San Pedro in 1913. Its alignment followed the Ridge Route north of Gorman and south of Reservoir Summit, a longer distance than any of the earlier transportation routes, but from Gorman south to the present location of Pyramid Lakemarker, where it turned east to Reservoir Summit, it roughly followed the later Ridge Route Alternate. That same year, the Midway Gas Company opened a natural gas line, and the Pacific Light and Power Company opened a power line, both staying fairly close to the entire Ridge Route.

The two general routes followed by the Butterfield Overland Stage and the Southern Pacific Railroad — known respectively as the Tejon Pass Route and the Tehachapi or Midway Route - were the main automobile routes between Los Angeles and the San Joaquin Valley at the turn of the century. The State Bureau of Highways recommended in 1895 that a more direct route be built to shorten this distance. A bond issue was approved in 1909 and 1910 to build a state highway system, including the Ridge Route. The new California Highway Commission was unable to raise funds in the Eastmarker, but Los Angeles again contributed funds to ensure that construction would go forward.

Beale's Cut in 1872
These routes all shared the roadway south of Saugus, which was generally flat but included the crossing of San Fernando Passmarker. As discussed earlier, this was deepened at the county's expense in 1858. The California State Legislature authorized a turnpike in 1861, and it was completed in 1863, then owned by Edward Fitzgerald Beale. The cut, which came to be known as Beale's Cutmarker, was deepened by Beale, and lowered once more by the county in 1904. To improve the crossing, the county bypassed the cut with the narrow 435-foot (133 m) Newhall Tunnelmarker, opened in October 1910.


The California Highway Commission considered several easterly routes between Saugus and Gorman: Soledad Canyon (used by the Southern Pacific) had frequent washouts; Mint Canyon (used by the Midway Route) was too long and cost too much; Bouquet Canyon (used by both automobile routes) had bad drainage; and San Francisquito Canyonmarker (used by the Tejon Pass Route) was steep and narrow. Another possible route, through Piru Canyon to the west, was rejected because of a proposal for a dam. (This route was later chosen for the Ridge Route Alternate, but had to be abandoned in the 1970s due to the construction of Pyramid Lakemarker.)Scott, pp. 64–65

Thus the route chosen was a direct line between Saugus and Gorman, over the top of the ridge for many miles. Due to cost and drainage concerns, the road was built with many curves, high in the mountains.Scott, pp. 64–65 Construction on the Ridge Route, officially considered to run from Castaic Junctionmarker (west of Saugus on the road to Venturamarker) to the bottom of the grade at Grapevinemarker, began in 1914.

The new road, designed with an ideal grade of 6% (but with several 7% grades, including at Grapevine), cut the distance by 24 miles (39 km) over the Tejon Pass Route or 58 miles (93 km) over the Midway Route. A speed limit of 15 miles per hour (25 km/h) was enforced between Castaic and Quail Lake, making the trip from Los Angeles to Bakersfield take about 12 hours. On the 48-mile (77 km) Ridge Route, between Castaic Junction and Grapevine, the curves added up to a total of about 109.5 complete circles, with a minimum radius of 70 feet (21 m). The unpaved road, which had cost $450,000, opened in October 1915.

In addition to being part of the state highway system (as a portion of the unsigned Sacramentomarker-Los Angeles Legislative Route 4), the road was also part of the National Park to Park Highway, a privately-designated auto trail, and became part of U.S. Route 99 in 1926. The continuation south via Saugus and the Newhall Tunnel towards Los Angeles, also part of Route 4, was added to the state highway system in 1917.

According to the San Francisco Chronicle, the new route was "one of the most remarkable engineering feats accomplished by the State Highway Commission. It is Southern California's Magnus Opus [sic] in mountain highway construction." It was also credited with stopping efforts to split California into two states, by linking its two halves over the rugged terrain separating them.

Work on paving the Ridge Route with 20-foot (6 m) wide and 4-inch (100 mm) thick reinforced concrete began in 1917, but was delayed until 1919 by the U.S. entry into World War I. During work on the central portion, traffic was detour via Mint and Bouquet Canyons. The road was reopened on November 15, 1919, completely paved except north of Lebecmarker, including the grade at Grapevine, which was only oiled. After a bond issue was passed in July 1919, this portion was paved from September 1919 to May 1921; the dangerous detour included a 20% grade. This paving added about $1 million to the cost, for a total price of about $1.5 million, not paid off until 1965. Asphalt was added on top of the concrete for 20 miles (32 km) south from Swede's Cut in 1922, and in 1924 a number of dangerous blind curves were widened and straightened.

Bypasses and the fate of the bypassed road

In 1929, the state decided to build a new bypass of the central portion through Piru Canyon, and to upgrade the northern portion over Tejon Pass and down the hill at Grapevine. This Ridge Route Alternate or Ridge Alternate Highway shortened the route by 9.6 miles (15 km) and increased the minimum curve radius from 70 feet (21 m) to 1000 feet (300 m). Construction began in 1930, and the road south of Tejon Pass was officially opened on October 29, 1933; replacement of the Grapevine grade was completed by 1936. The road, which included a center "suicide" passing lane, cost $3.5 million, paid for by the state gas tax. It was estimated that it would pay itself off in 2.5 years with the savings in time and gas. A new bypass of the Newhall Tunnelmarker, through Weldon Canyon, had been opened on May 28, 1930, thus giving drivers a better route all the way from Los Angeles to Bakersfield.Scott, pp. 60–61 The roadway was widened to an expressway by 1952 at a cost of $13.5 million, providing two lanes in each direction and a center median, but retaining at-grade intersections.

Even this four-lane Ridge Route Alternate was not good enough for the large amounts of traffic using the road, and construction of the eight-lane freeway Interstate 5 with a minimum curve radius of 3000 feet (900 m) began in June 1963. Large parts of the Ridge Route Alternate were incorporated into the new roadway, but the area through the present Pyramid Lakemarker was completely bypassed. Interstate 5 over the mountains between Castaic Junction and Grapevine, still in use today, was completed on August 24, 1970 at a cost of $103 million.

Meanwhile, the old road continued to exist in several pieces as a local county road. The longest preserved segment was that part completely bypassed by the Ridge Route Alternate, between Castaicmarker and State Route 138 near Sandbergmarker, including the portion through the Angeles National Forestmarker. The road for about 2 miles (3 km) south from SR 138 is part of County Route N2, but the rest only serves local travel.

Harrison Scott was traveling north on Interstate 5 with his son in 1991, when his son speculated about the difficulty of driving over the first road through the rugged terrain. Having some extra time, and recalling a drive on the old road in 1955, they left the freeway and traveled along most of the abandoned section. Near SR 138, Scott asked a county road crew which was resurfacing the road if it was still maintained by the county, and the crew replied that they didn't know who maintained it through the desert. It turned out that the county officially owned it but did not maintain it; Scott has since convinced the county and forest to exchange ownership with the Santa Anita Canyon Road, then a county road.

For the next six years, Scott worked on getting the road added to the National Register of Historic Places, and finally succeeded when, on September 25, 1997, the National Park Service added the 17.6 miles (28.3 km) within the forest to the National Register. He subsequently wrote a book, Ridge Route: The Road That United California, from the research he had done for the National Register application.Scott, pp. 285-289

The Ridge Route through the forest south of Tumble Inn was officially closed due to heavy rainfall in early 2005, which caused landslides and problems with energy lines through the area. As of 2007, the pipelines are still being repaired, and it is expected that road repairs will begin in June.

External links


  • Page numbers refer to the third printing, published 2003 with ISBN 0-615-12000-8.
  1. California State Legislature, Assembly Concurrent Resolution No. 98—Relative to the 1915 Ridge Route Highway Historical Monument, filed with Secretary of State October 2, 2001
  2. Scott, pp. 74–75
  3. California State Legislature, Assembly Bill 635, filed with Secretary of State October 12, 2001
  4. California State Legislature, Assembly Bill 1717, filed with Secretary of State September 25, 2003
  5. Scott, pp. 89–91
  6. Scott, pp. 93–94
  7. Scott, pp. 100 and 289
  8. Scott, p. 102
  9. Scott, p. 283
  10. Scott, pp. 114–119
  11. USGS topographic map, Liebre Mountain 7.5-minute quadrangle (1988)
  12. Scott, pp. 71, 119–120
  13. Scott, pp. 43–45, 121–126
  14. Scott, pp. 126–130
  15. Scott, pp. 135–138
  16. Scott, pp. 144–160
  17. Scott, pp. iii-iv
  18. Scott, pp. 162–224
  19. Scott, pp. 1–2
  20. Scott, pp. 15–19, 24–25
  21. Scott, pp. 63–64
  22. Rand McNally's New 11 x 14 Map of California, 1895
  23. Scott, pp. 31–32
  24. Scott, pp. 37–38, 41–42
  25. Scott, pp. 47–51
  26. Scott, pp. 23–27
  27. Scott, p. 57
  28. Scott, p. 67
  29. Scott, p. 85
  30. Scott, p. 285
  31. Scott, pp. 69–75
  32. Scott, p. 76
  33. Rand McNally Junior Road Map of California and Nevada, 1926
  34. Scott, p. 77
  35. Scott, p. iv
  36. Scott, p. 284
  37. Scott, pp. 79–86
  38. Scott, p. 285
  39. Scott, p. 285
  40. Scott, p. 285
  41. Scott, pp. 265–267
  42. Scott, pp. 283–285

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