For 20 years now, Northwest String Summit has brought droves of fans to Horning’s Hideout in North Plains, Oregon—a short, thirty-minute drive northwest from Portland—for a long weekend of world-class musicianship and decade-spanning friendships in the most idyllic Pacific Northwest summer setting. Today, festival organizers announced a hefty addition to Sting Summit’s already-stacked lineup for the festival’s 20th-anniversary event over July 21-24. In addition to previously announced headliners Umphrey’s McGee, Yonder Mountain String Band, and Greensky Bluegrass, Joe Russo’s Almost Dead will bring their beloved reimaginings of the Dead’s vast catalog and beyond to String Summit’s main stage. Keller Williams will bring along his Compadres (previous Compadres include members of String Cheese Incident, Leftover Salmon, and Elephant Revival), Sierra Hull will bring her mighty mandolin prowess back to Horning’s Hideout, and the artistic cross-pollination of Ghost Light will be on full display.