Shenandoah Vally Fiber Festival The Fiberists will be at the Shenandoah Valley Fiber Festival September 27 & 28, 2014. Come by and see all of our yarns and fiber in person! The Shenandoah Valley Fiber Festival is a two day event on the last weekend in September. It takes place at the Clarke County Ruritan Fair Grounds in Berryville, VA. Although it isn't as large as The Maryland Sheep & Wool Festival or Rhinebeck, it is definitely one of our favorites!