Mammoth Mountain Closing Day 2025 Schedule. The official opening and closing dates for marmot basin, alberta for current and past seasons. Mammoth mountain is currently scheduled to close on memorial day weekend, which means you’ll have an extra day to enjoy the last of winter and the first of summer.
Night of lights is a free fireworks spectacular that lights up. The official opening and closing dates for marmot basin, alberta for current and past seasons.