BOISE, Idaho — The stage is set for Treefort Music Fest. On Thursday morning, festival organizers released the final and complete lineup for the 2026 Treefort Music Fest. Notable additions include jam-band great Andy Frasco, hometown heroes Built to Spill, and garage-punk pioneer Toody Cole and Her Band. Treefort Music Fest is a 5-day music festival held throughout Downtown Boise from Mar. DJ PhakePolaruzLearn More: Treefort Music Fest | 2026