Audrey and Emily Rodrigue landed at San Francisco International Airport last Saturday, August 25, according to the the San Mateo County Sheriff's department.
Audrey, 29, sent her boyfriend a text the next day. After that, he was unable to reach her.
The two reportedly rented a dark gray 2018 Ford Focus and reserved a camp site at the Fish Lake Campgrounds in Six Rivers National Forest in Orleans for the 28th.
Officials say they never arrived.
Police say Audrey was driving a dark gray 2018 Ford Focus with the license plate 8DIN900. Both Audrey and her daughter are described as blonde with blue eyes.
If anyone has seen Audrey, Emily and/or their rental car, please call 911, or Detective Fava at 650-363-4192.