The mother of Abigail, 14, and Hattie, 16, Arres noticed they were missing Monday around 8 p.m. and found a window open in the home's bathroom.
Detectives said the parents were concerned because the girls had never gone missing before, adding that they may have traveled to the Palm Desert area.
On Thursday morning, the Riverside County Sheriff's Department announced that the girls had been found. No other details were disclosed.