On what map is League of Legends' ARAM mode played?

League of Legends’ ARAM mode is played on the Howling Abyss.

ARAM means “All Random, All Mid,” describing its defining rules: two teams fight along one lane, and champions are assigned randomly from the available selection pool. Howling Abyss is the frozen bridge-like battlefield built for that format. Unlike Summoner’s Rift, it has no conventional top, middle, and bottom lanes or a separate jungle area.

The map’s narrow design makes combat frequent and limits the strategic space available to players. Champions generally cannot return to the shop after leaving their base unless they die, so deaths and item timing matter differently than they do on Summoner’s Rift. Health relics and long-range abilities also become especially important because teams repeatedly contest the same corridor.

Summoner’s Rift is the standard three-lane map, while Twisted Treeline was an older three-versus-three map that has since been retired. Crystal Scar was associated with Dominion, another discontinued mode, not modern ARAM. Riot has occasionally introduced themed ARAM variations, such as Butcher’s Bridge, but Howling Abyss remains the canonical map associated with the mode.