UPDATE:
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.
UPDATE:
ISLAND PARK, Idaho (KIFI) — Traffic is now moving intermittently along U.S. Highway 20 near Island Park following a fatal crash that occurred earlier today, according to the Fremont County Sheriff’s Office. The Sheriff’s Office reported at 3:50 PM that significant delays are still expected due to the volume of vehicles in the area.
The West Yellowstone Police Department confirmed the incident as a fatal accident via a Facebook post. While official details about the crash itself remain limited, eyewitnesses at the scene have reported seeing ambulances departing the area.
The incident took place sometime before 11:55 AM today, Friday, July 4, near milepost 380.
This is a developing story. Local News 8 is actively working to gather more details and will provide updates as new information becomes available.
ORIGINAL:
ISLAND PARK, Idaho (KIFI) — Idaho State Police Troopers are on the scene of a fatal crash on U.S. 20 near Island Park. The accident occurred sometime before 11:55 AM, Friday, July 4, near milepost 380.
Traffic has been blocked in both directions – Eastbound and Westbound. The Fremont County Sheriff’s Office is asking travelers heading in that direction to take an alternate route.
Local News 8 has a team headed to the crash site and will update this developing story as more details become available. Keep track of accidents and traffic updates at 511.idaho.gov.
