Contents

California State Route 66

State Route 66
SR 66 highlighted in red, with relinquished portions in pink.
Route information
Maintained by Caltrans
Length	32.321 mi[1][a] (52.016 km)
Existed	1974 (from US 66)[citation needed]–present
Major junctions
West end	SR 210inLa Verne
Major intersections	SR 83inUpland I-15inRancho Cucamonga
East end	I-215inSan Bernardino
Location
Country	United States
State	California
Counties	San Bernardino, Los Angeles
Highway system
State highways in California Interstate US State Scenic History Pre‑1964 Unconstructed Deleted Freeways
← US 66 → SR 67

State Route 66 (SR 66) is a state highway in the U.S. stateofCalifornia that runs along a section of old U.S. Route 66inLos Angeles and San Bernardino counties. It goes from State Route 210inLa Verne east to Interstate 215inSan Bernardino, passing through Claremont, Upland, Rancho Cucamonga, Fontana and Rialto along Foothill Boulevard. In San Bernardino, it is the part of Fifth Street west of H Street (at the Interstate 215 interchange).

Route description[edit]

The route begins as Foothill Boulevard at the interchange with SR 210 in the city of La Verne. SR 66 heads southeast for a few miles before entering Pomona and turning due east. The highway continues into the city of Claremont, passing by Claremont Colleges, before crossing into Upland, San Bernardino County.^[2]

In Upland, SR 66 passes by Cable Airport to the south, continuing due east. The highway intersects SR 83 before entering Rancho Cucamonga, where state maintenance of SR 66 currently ends. Foothill Boulevard continues east through Rancho Cucamonga through an interchange with I-15 before entering Fontana, and passing well north of the California Speedway. Foothill Boulevard continues east into Rialto, where the SR 66 designation resumes. SR 66 continues east into San Bernardino, before curving to the north as 5th Street and terminating at I-215 south of downtown.^[3]

California's legislature has relinquished state control of the segment from the Pomona–Claremont line east to the Fontana–Rialto line, and turned it over to local control.^[4]

SR 66 is part of the California Freeway and Expressway System,^[5] although it is neither a freeway nor an expressway. SR 66 is part of the National Highway System,^[6] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.^[7]

History[edit]

As a state route, SR 66 was added to the state highway system in the 1964 state highway renumbering, from SR 30 around San Dimas to San Bernardino.^[8] By 2013, the portion from east of Pomona to the eastern boundary of Rialto had been relinquished to the various cities that the route passed through.^[9]

Major intersections[edit]

Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers to an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see California postmile § Official postmile definitions).^[1] Segments that remain unconstructed or have been relinquished to local control may be omitted. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.

County	Location	Postmile [1][10][11]	Destinations	Notes
Los Angeles LA R0.19-5.34	La Verne	R0.19	Foothill Boulevard	Continuation beyond SR 210; former US 66 west
		R0.19	SR 210 (Foothill Freeway) – Pasadena, San Bernardino	Interchange; west end of SR 66; future I-210; SR 210 exit 47
		1.73	Fruit Street, White Avenue
	Pomona	2.54	Garey Avenue
	Pomona–Claremont line	3.22	Towne Avenue to I-10	East end of state maintenance
	Claremont	4.16	Indian Hill Boulevard
San Bernardino SBD 0.00-23.05	Upland	0.58	Central Avenue to I-10
		1.69	Mountain Avenue
		2.78	SR 83 (Euclid Avenue) to I-10
	Rancho Cucamonga	4.08	Grove Avenue
		6.15	Archibald Avenue
		7.33	Haven Avenue
		9.80	I-15 (Ontario Freeway) – San Diego, Barstow	Interchange; I-15 exit 112
		10.33	Etiwanda Avenue
	Fontana	12.33	Cherry Avenue
		14.36	Citrus Avenue
		15.37	Sierra Avenue
		16.39	Alder Avenue
	Fontana– Rialto line		West end of state maintenance
	Rialto	19.13	Riverside Avenue
	Rialto–San Bernardino line	20.14	Pepper Avenue
	San Bernardino	22.41	Mount Vernon Avenue	Former US 66 east
		23.05	I-215 (San Bernardino Freeway) – Riverside, Barstow	Interchange; east end of SR 66; former I-15E / US 91 / US 395; I-215 north exit 44A, south exit 44
		23.05	5th Street - Downtown San Bernardino	Continuation beyond I-215
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Notes[edit]

See also[edit]

• California Roads portal

References[edit]

External links[edit]

Wikimedia Commons has media related to California State Route 66.

• Caltrans: State Route 66 highway conditions
• Caltrans Traffic Conditions Map
• California Highway Patrol Traffic Incidents
• California @ AARoads.com - State Route 66
• California Highways: SR 66