Deputies investigating fatal mountain bike crash near Avimor - Ada County Sheriff

(Please see for the latest version of this information)

Home > News > Deputies investigating fatal mountain bike crash near Avimor

Deputies investigating fatal mountain bike crash near Avimor

A 38-year-old Boise man suffered fatal injuries after his mountain bike went off a trail and down a steep gulch in the Foothills near Avimor Saturday morning.

Deputies began their investigation shortly before 9 a.m. Saturday after dispatchers got a 911 call reporting that 38-year-old Jason Delgadillo had crashed his mountain bike on the Spring Valley Creek trail, was not breathing, and that people were doing CPR.

Ada County paramedics and an air ambulance were also sent to the crash site.

The first deputy who arrived found three people doing CPR on Delgadillo near a creek at the bottom of the gulch. They then moved the man up to the trail and continued CPR until paramedics arrived moments later and took over.

Witnesses later told investigators Delgadillo was riding on the trail with another man when they got separated. The other rider could not locate Delgadillo and asked some hikers if they had seen another cyclist. They did not, so the rider began backtracking and found an area where tire marks went off the trail.

That’s when the cyclist saw Delgadillo and his mountain bike lying in the bottom of a gulch, about 10-to-15 feet from the trail, in a creek. There was dense vegetation on the sides of the gulch. Delgadillo was not breathing.

The other cyclist began CPR. He then decided he needed help and found some nearby hikers, who called 911. Then they all began providing CPR until paramedics arrived.

The air ambulance helicopter arrived at the scene a short time later but did not take the man back to a hospital as emergency crews determined Delgadillo could not be revived.

People who know Delgadillo told deputies he was an experienced mountain bike rider.  Witnesses say he was wearing a helmet.

Ada County Coroner’s officials said Monday they are still establishing the cause and manner of Delgadillo’s death.