Riverside County sheriff's deputies said they were responding to a call of an armed assault at Jasper Loop and Aspen Leaf Lane at about 8 p.m. when they found the victim with a number of gunshot wounds.
Responding deputies tried to resuscitate her to no avail. She was pronounced dead at the scene.
The woman's identity was not released.
There's no suspect description, and the circumstances surrounding the shooting were not immediately known.