Northbound Interstate 11 Reopens Following Six-Hour Total Gridlock From Four-Vehicle Semi Pileup Near Boulder City

BOULDER CITY, NV — High-volume commercial shipping corridors leading into the Southern Nevada basin finally stabilized early Tuesday morning after hazardous materials teams and heavy wreckers completed an intensive overnight clearance operation along Interstate 11.

The emergency response successfully resolved a massive transportation lockout that left hundreds of freight haulers and regional commuters trapped for nearly six hours on Monday.

The Mile Marker 7 Chain-Reaction Crash

The Nevada Highway Patrol (NHP) confirmed that all travel lanes on northbound Interstate 11 near mile marker 7 within Boulder City were officially cleared and reopened past midnight. The major arterial highway had been completely paralyzed following a violent, four-vehicle pileup that transpired just after 7:30 AM on Monday, June 22, 2026.

The chain-reaction crash involved three commercial semitractor-trailers and a white Dodge Ram pickup truck that was towing a 40-foot gooseneck trailer. The force of the multi-rig impact caused one of the freight trailers to jackknife completely across the northbound travel lanes, creating an impassable physical barrier. NHP troopers and local emergency response teams rushed to the scene; remarkably, safety officials confirmed that no injuries were reported despite the catastrophic structural damage to the vehicles.

Six-Hour Closure for Hazmat and Rig Recovery

Because the high-impact collision ruptured the fuel cells of the commercial big rigs, a substantial diesel fuel spill and extensive freight debris coated the highway asphalt. To safeguard the public, NHP enacted a hard closure, forcing all northbound traffic off the interstate at the Mile Marker 2 exit to route onto the Boulder City Parkway.

Heavy-duty commercial tow operators spent hours uprighting the entangled frames of the semis, while environmental remediation crews scrubbed the lanes to remove slick fuel hazards. State highway safety inspectors thoroughly audited the structural integrity of the pavement before giving final clearance to reopen the lanes, allowing delayed regional logistics fleets to finally resume transit into Henderson and Las Vegas.

Source: Nevada State Police Incident Command Logs, Regional Transportation Commission FASTCam Network Logs.