For the former highway signed as Route 70, see U.S. Route 70 (California).
State Route 70
SR 70 highlighted in red
Route information
Maintained by Caltrans
Length
178.528 mi[1] (287.313 km)
(plus about 0.5 mi (1 km) on SR 20)
History
State highway in 1910 and 1931; became SR 24 in 1934, US 40A in 1954, and SR 70 in 1964
Tourist routes
Feather River Scenic Byway
Major junctions
Southwest end
SR 99 near Pleasant Grove
Major intersections
SR 20 in Marysville
SR 162 in Oroville
SR 149 near Oroville
SR 89 from near Indian Falls to Blairsden
Northeast end
US 395 at Hallelujah Junction
Location
Country
United States
State
California
Counties
Sutter, Yuba, Butte, Plumas, Lassen
Highway system
State highways in California
Interstate
US
State
Scenic
History
Pre‑1964
Unconstructed
Deleted
Freeways
← US 70
→ SR 71
State Route 70 (SR 70) is a state highway in the U.S. state of California, connecting SR 99 north of Sacramento with U.S. Route 395 (US 395) near Beckwourth Pass (lowest in the Sierra Nevada) via the Feather River Canyon. Through the Feather River Canyon, from SR 149 to US 395, SR 70 is the Feather River Scenic Byway, a Forest Service Byway that parallels the ex-Western Pacific Railroad's Feather River Route.
The Beckwourth Trail was the earliest predecessor of SR 70, which was a spur of the California Trail. This was followed by the railroad, mostly built on the route of the trail; a dirt road was needed for construction that was later converted into part of the present state highway. Construction on the highway began in 1928, which involved the boring of three tunnels. Previously, the road was signed as U.S. Route 40 Alternate, crossing the Sierra Nevada at a lower elevation than Donner Pass on US 40, now Interstate 80 (I-80). The road was renumbered SR 70 in the 1964 state highway renumbering. Today, portions of SR 70 have been upgraded to a four-lane expressway, and even a freeway in a few locations.
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Global Information
Feather River Scenic Byway
SR 99 near Pleasant Grove
US 395 at Hallelujah Junction
