Special routes of U.S. Route 101
Los Angeles alternate route
|Location:||Los Angeles, California|
Present SR 1 in the Los Angeles area was U.S. Route 101 Alternate from the mid-1930s to 1964.
Los Angeles bypass route
|Location:||Los Angeles – Anaheim, California|
The precursor to the Santa Ana Freeway between Los Angeles and Anaheim was U.S. Route 101 Bypass from the early 1940s to the mid-1950s, when it became part of US 101. Old US 101 there is now partially SR 72.
Ventura business loop
US 101 Business in Ventura, California is a business loop that follows the former U.S. 101 alignment before the construction of the Ventura Freeway. The route runs along the entirety of Thompson Boulevard and portions of Main Street and Garden Street.
San Francisco bypass route
|Location:||El Camino Real, California|
Fortuna business loop
McKinleyville business loop
Astoria business loop
|Length:||7.40 mi (11.91 km)|
U.S. Route 101 Business is a business loop of US 101 that travels from Astoria to Warrenton. It is a former alignment of US 101, bypassed in 1964 when a new bridge opened across Youngs Bay. It was originally designated U.S. Route 101 Alternate until about 1976.
The entire route is in Clatsop County.
|Warrenton||1.27||2.04||US 101 – Astoria, Seaside|
|Lewis and Clark River||4.67–
|Lewis and Clark River Bridge|
|Old Youngs Bay Bridge|
|OR 202 east – Jewell, Vernonia||South end of OR 202 overlap|
|0.18||0.29||US 101 to US 30 – Warrenton, Seaside, Astoria, Portland||North end of OR 202 overlap|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
Ilwaco alternate route
|Location:||Long Beach, Washington|
- "Warrenton-Astoria Highway No. 105 Straightline Chart" (PDF). Oregon Department of Transportation. Retrieved February 17, 2014.
- "Nehalem No. 102 Straightline Chart" (PDF). Oregon Department of Transportation. Retrieved February 17, 2014.