From the event webpage:

Write On The River is North Central Washington’s only writing conference.  Two days of content-packed workshops with professional editors, successful agents, bestselling authors and nationally-acclaimed speakers, Write On The River is the best way to hone your craft, build your dream and move your writing forward.  Whether your goal is to be a published author, write articles for a local magazine, develop your poetry, or simply write for your own enjoyment, Write On The River has something for you.  Held every May on the beautiful Wenatchee Valley College in Wenatchee, Washington, Write On The River is a writing conference not to be missed!

See the conference webpage for details about events and costs.