California State Route 45

State Route 45
State Route 45
	SR 45 highlighted in red
Route information
	Maintained by Caltrans
Length	70 mi (110 km)
Existed	1934–present
Major junctions
South end	SR 113 at Knights Landing
	SR 20 from near Sycamore to Colusa; SR 162 from Codora to Glenn;
North end	SR 32 at Hamilton City
Location
Country	United States
State	California
Counties	Yolo, Colusa, Glenn
Highway system
	State highways in California; Interstate; US; State; Scenic; History; Pre‑1964; Unconstructed; Deleted; Freeways;

State Route 45 (SR 45) is a state highway in the U.S. State of California that travels in a north–south direction in the Sacramento Valley from Route 113 in Knights Landing to Route 32 in Hamilton City.