Bannered 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.
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.