Bachmann is scheduled to speak at a rally at the O.C. Fair and Event Center in Costa Mesa. More than 1,000 people are expected at the rally, which is scheduled from 9-10 a.m.
She will then speak at a California Republican Party Convention in downtown L.A.
The Minnesota congresswoman will also be a guest on "The Tonight Show with Jay Leno."
Bachmann campaigned in Phoenix on Wednesday, where she met with Maricopa County Sheriff Joe Arpaio. She's hoping to win his support to show that she is tough on immigration.
Arpaio made national headlines for his tough stance on prisoners and illegal immigration.
"As president of the United States, I want to solve the border issue," Bachmann said to reporters in Arizona. "I want to build the fence that needs to be built and I want to solve this problem."
She said she would also eliminate inducements for illegal immigration into the U.S.
Arpaio said he hasn't yet decided which candidate he will back in the GOP primary race.
Arpaio's campaign manager, Chad Willems, said Bachmann has called the sheriff several times, but she isn't the only presidential hopeful to do so. Mitt Romney and Rick Perry have made calls of their own.
The Associated Press and City News Service contributed to this report.
