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
Study says Paine Field should be used for business, not museum Judge to decide future of sex crime case against ex-police sergeant Tamper-proof cigarette bins may cut down on litter in downtown Everett 2 arrested in fatal shooting near Lynnwood; victim unidentified 'The voice of reason': Mill Creek Police Chief Bob Crannell to retire Boy, 12, brings inoperable gun to school and is arrested Camano Island Fire and Rescue seeks volunteers; meeting Oct. 13 Arlington man identified as rider in fatal motorcycle crash
Our new comment system is not supported in IE 7. Please upgrade your browser here.