The wreck happened about 11 a.m. near the intersection of 140th Street NE and Meridian Avenue, Snohomish County sheriff's spokeswoman Shari Ireton said.
Investigators believe the man may have rear-ended a truck that was towing a boat on a trailer.
The impact sent his vehicle off the road, where it rolled over, she said.
The man was taken via helicopter to a Seattle hospital. No other injuries were reported.
More Local News Headlines
Warm waters bring more restrictions on salmon fishing in Tulalip Little is known about bull kelp, which nearly all marine life here relies on Sound Transit succumbs to ‘cost of doing business’ Stanwood-Camano fair expands activities for children Two seek to oust Noble from Edmonds School Board seat Paine Field passenger flights resound with Mukilteo voters Front Porch: Camano Island Library grand opening Crews try to save man pulled from Stillaguamish River
Our new comment system is not supported in IE 7. Please upgrade your browser here.