Toronto's Prepare the Ground festival has revealed its initial lineup for the fourth edition, scheduled for 4–6 June 2027 across Trinity St. Paul's, Lee's Palace, Dance Cave and Tranzac. The first wave reads like a curated cross-section of heavy psych, doom and post-metal: Agalloch, SubRosa, Dark Castle, Primitive Man performing “Observance”, KEN mode performing “ ”, Bosse-de-Nage, Junius, Franklin, Lamp of Murmuur, Malfet and Thrä. Three-day passes are on sale via Dice.fm.

The announcement notes the Canadian return of two long-absent heavy hitters — Agalloch and SubRosa — alongside Dark Castle, whose last album arrived 15 years ago. Festival art is by Stephen Wilson. More acts are promised in the coming months.