This segment was LRN 5, and was added to the state highway system in 1909.
Near the mission (at Mission Blvd), Route 9 diverged, continuing signed as Route 9 (but still LRN 5) along what is now Route 238, ending at US 50 (present-day I-580). Santa Cruz (Route 1) to Boulder Creek No items of interest. Route 35 to Route 17 near Rinconada In March 2017, the CTC amended the SHOPP to include almost M in funding on Route 9 near Saratoga, from Santa Cruz County line to Sanborn Road (4-SCl-9 0.0/4.8).
In February 2017, it was reported that the first three phases of the Highway 9 Pedestrian/Bicycle Improvement Project are complete and the fourth phase was set to begin.
[SHC 263.3] From Route 1 near Santa Cruz to Route 236 near Boulder Creek; and from Route 236 near Boulder Creek to Route 236 near Waterman Gap; and from Route 236 near Waterman Gap to Route 35; and from Saratoga to Route 17 near Los Gatos; and from Blaney Plaza in Saratoga to Route 35.
The route that would become LRN 9 was defined in the first set of highway bonds in 1909, with a rough routing of "San Fernando to San Bernardino".
In 1963, this was defined to run "from Route 17 near Santa Cruz to Route 17 near Los Gatos via Waterman Gap and Saratoga Gap and along the ridge between the San Lorenzo and Pescadero Creeks." In 1981, Chapter 292 changed the western origin to Route 1 near Santa Cruz.
In 1934, Route 9 was signed along the route from Santa Cruz to Milpitas via Redwood Park.