She said she's long fought for California's environment and will continue her advocacy against oil drilling off the state's coast.
Boxer also said protecting the coastline will help protect thousands of jobs.
"Anyone who says they are ready, willing and able to destroy this coastline does not understand really what our work is here as human beings, to protect this God-given legacy, number one, and protect the 400,000 jobs, small businesses like Perry's, who depend on the coastline," Boxer said.
Boxer's lead in the race against G.O.P. newcomer Carly Fiorina has shrunk in recent months, but the senator says if voters turn out, she'll win.
Meantime, Fiorina focused her efforts in the Bay Area on Saturday, where she's holding a "get out the vote" event.
In the race for governor, Whitman said she's fighting for every vote she can.
The former eBay chief executive is focusing specifically on Asian-American voters.
Whitman began her day of statewide appearances at a Vietnamese restaurant in San Jose, followed by events in Koreatown and San Gabriel Valley.
A recent poll shows the Republican trailing Democratic opponent Jerry Brown by eight percentage points.
Whitman hopes to close that gap by focusing on undecided voters.
Her aides said these campaign stops can help peel off voters who might consider supporting Brown.