Lost Lands at Legend Valley is a bass-music festival curated by dubstep producer Excision and staged outdoors at the Legend Valley venue near Buckeye Lake in Thornville, Ohio. The event focuses on heavy bass and bass-centric electronic acts and is known for its immersive dinosaur-themed production, large-scale sound systems, and elaborate visual staging. Excision commonly headlines the festival alongside a lineup of prominent dubstep and bass artists.