Holly Armstrong, for the past two years Gov. Chris Gregoire's top spokeswoman, will leave in November.
"It was a very difficult (if not gut-wrenching) decision, but, ultimately, the best one for me," she wrote in an email to staffers and capitol reporters this morning.
Armstrong said she's planning to move to Colorado to be closer to friends and family.
"I have been consistently proud to work with the Gregoire Administration and will very much still consider myself to be part of Team Gregoire," she wrote.