Both were taken to Whidbey General Hospital in Coupeville.
The driver, 48, is under investigation for vehicular assault, the Washington State Patrol reported. Troopers believe alcohol was a factor in the crash, according to an accident memo.
The Coupeville woman was driving a 2007 GMC pickup truck southbound on Zylstra Road at Hastie Lake Road when it crossed the centerline and struck a tree, troopers reported.
Her passenger -- a 9-year-old child whose gender was not reported -- is from Lake Stevens.
The crash remains under investigation.
More Local News Headlines
Cost overruns, location, parking needs put courthouse on hold Clarence Robertson volunteered for 56 years as a reserve deputy 5-story building in Mill Creek would include affordable housing Island County undersheriff resigning to care for his children Front Porch: Light a candle for a loved one School winners Community calendar Evergreen State Fair Judging results
Our new comment system is not supported in IE 7. Please upgrade your browser here.