ISP investigates two-vehicle fatal collision near Island Park

FREMONT COUNTY, Idaho – Idaho State Police is investigating a two-vehicle fatality crash that occurred on Friday, July 4, 2025, at approximately 11:43 AM, on US20 near milepost 380.8, south of Island Park.

 A 40-year-old, from Shelley, was travelling westbound in a 2026 Freightliner semi-truck pulling a semi-trailer.

A 42-year-old male and passengers from Idaho Falls, were travelling eastbound in a 2011 Toyota Sienna Minivan.

The Freightliner went off the westbound shoulder, then back on to the roadway from overcorrection, then crossed the median and into the eastbound lanes of travel impacting the Toyota. The Toyota overturned and blocked the eastbound lanes of travel.

The driver of the Freightliner was transported by ground ambulance to a local hospital.

The occupants of the Toyota, including four additional adults and three juveniles were transported by ground ambulance to a local hospital.

All occupants were wearing their seatbelts.

One juvenile passenger from the Toyota succumbed to their injuries.

All lanes of US20 were blocked for approximately 5 hours.

Idaho State Police was assisted by the Fremont County Sheriff’s Office, Island Park Fire Department, Island Park Ambulance, Ashton Ambulance, and Hebgen Lake Paramedics from West Yellowstone, Montana. 

This incident remains under investigation by Idaho State Police.

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Posted in District 6 - Eastern Idaho