They will be placed from North Market Street in Redding down to where Interstate 5 meets Highway 273 south of Anderson.

Upon exiting a suburban area, the route enters farmland, while paralleling the Sacramento River.

The roadway then enters suburban Redding, where it turns away from the Sacramento River and zigzags along local roads through downtown, where it meets State Route 299.

Upon exiting downtown, SR 273 crosses the Sacramento River and meets its northern terminus at Interstate 5 in the suburbs of Redding.

[4] Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment of U.S. Route 99 as it existed at that time, and do not necessarily reflect current mileage.