Motorcyclist Killed Near Del Valle Road and Mines Road

What Public Logs Say Happened

The crash was logged at about 11:38 a.m. on July 3 near Del Valle Road and Mines Road in Alameda County. Updated reporting from Pleasanton Weekly and Livermore Vine, citing CHP Officer Tyler Hahn, says Perez was traveling north on Del Valle Road when she lost control south of Mines Road.

CHP reported that the motorcycle left the roadway and that Perez was ejected about 200 feet down a ravine. The Alameda County Coroner's Bureau identified her as Aileen Perez, 26, of Livermore.

CHP Dublin is seeking witnesses. The updated reporting identifies this as a solo crash, but it does not confirm the final collision factors, roadway conditions, speed, impairment, visibility, or mechanical issues.

July 6 Update: CHP Describes Solo Crash and Ravine Ejection

Updated public reporting citing CHP Officer Tyler Hahn says the crash involved a solo rider who lost control, left Del Valle Road, and was ejected about 200 feet down a ravine. Pleasanton Weekly and Livermore Vine reported that the Alameda County Coroner's Bureau identified the rider as Aileen Perez, 26, of Livermore, and that Lawrence Livermore National Laboratory confirmed she was an employee there. CHP Dublin is asking anyone with information to contact investigators.

July 8 Update: Rider Identified as Aileen Perez

Pleasanton Weekly and Livermore Vine reported July 8 that the Alameda County Coroner's Bureau identified the rider as Aileen Perez, 26, of Livermore. The reporting also said Lawrence Livermore National Laboratory confirmed Perez was an employee at the lab.

Why Motorcycle Fatality Reports Can Change

Initial dispatch logs often capture fast-moving reports from callers, fire crews, law enforcement, and tow operators. Those entries can help establish time and location, but they are not the same thing as a final collision report.

In a fatal crash, investigators may still need to review vehicle damage, roadway evidence, photographs, nearby video, witness statements, toxicology results, and any available electronic vehicle data.

Because motorcycle crashes can involve small debris fields, roadway evidence, sight-distance issues, and possible vehicle contact that is not obvious in the first log entry, preserving evidence quickly can be important while investigators determine the actual sequence.

Legal Issues After a Fatal Alameda County Motorcycle Crash

If another driver, a dangerous roadway condition, a defective motorcycle component, or another outside factor contributed to a fatal motorcycle crash, surviving family members may have the right to bring a wrongful death claim under California law.

Motorcycle fatality investigations deserve careful review even when the first public log is brief. A crash can appear straightforward at first and later involve roadway design, visibility, debris, vehicle defects, missing warnings, or another party's actions.

A wrongful death lawyer can help request records, preserve evidence, review insurance coverage, and identify whether any government-claim deadline may apply.

Evidence Families May Want Preserved

Important evidence may include the CHP collision report, 911 and dispatch records, photographs, tow records, vehicle inspection data, roadway measurements, nearby surveillance footage, and statements from witnesses or first responders.

If public property or roadway design is involved, California government-claim deadlines can be much shorter than the ordinary wrongful death deadline. Early investigation helps protect those rights while facts are still fresh.

Families do not need to know the full cause before asking for a review. The immediate goal is to keep evidence from disappearing while the official investigation continues.