IDAHO FALLS, ID – Idaho State Police are investigating a fatal two-vehicle crash that occurred on Friday, July 4, 2025, at approximately 11:43 a.m. on U.S. Highway 20 near milepost 380.8, just south of Island Park.
According to authorities, a 40-year-old driver from Shelley was operating a 2026 Freightliner semi-truck pulling a semi-trailer westbound on US20. A 42-year-old male from Idaho Falls was traveling eastbound in a 2011 Toyota Sienna minivan with passengers.
Police report that the Freightliner veered off the westbound shoulder and, after overcorrecting, crossed the median into eastbound traffic, where it collided with the Toyota. The impact caused the minivan to overturn, blocking the eastbound lanes.
The semi-truck driver was transported by ground ambulance to a local hospital. All occupants of the Toyota—including four additional adults and three juveniles—were also taken to a local hospital.
All individuals involved in the crash were wearing seatbelts.
One juvenile passenger in the Toyota succumbed to injuries sustained in the crash.
U.S. Highway 20 was fully blocked for approximately five hours as emergency crews responded to the scene.
Assisting at the scene were the Fremont County Sheriff’s Office, Island Park Fire Department, Island Park Ambulance, Ashton Ambulance, and Hebgen Lake Paramedics from West Yellowstone, Montana.
The crash remains under investigation by Idaho State Police.
