Missing Person / At-Risk Teenager 

September 29, 2026 – Santa Clara County Sheriff's Office officials report that they are asking for the community’s help to find 14-year-old Mia “Alex” Rivas.

Alex was last seen on camera at 4:50 a.m. on Monday near N. Tantau Avenue and Stevens Creek Boulevard in City of Cupertino.

She was wearing:

• Black pants
• Black sweatshirt with white stars
• Blue sneakers with rainbow beads on the laces

Alex is described as:

• 14 years old
• 5'8" tall
• 110 lbs.
• Brown hair
• Brown eyes

Our Santa Clara County Search and Rescue Team searched the area using canines, but she has not yet been located. Alex is believed to be at risk.

If you see her or have any information about her whereabouts, call 9-1-1 immediately. Please share.

Source: Santa Clara County Sheriff's Office