C R Y S. T A L G L I D E. S. S. SYMPHONY AMPHITHEATRE - FOLD BELOW TO SEE INSET. 7TH HEAVEN - FOLD BELOW TO SEE INSET. BLACKCOMB GLACIER - FOLD BELOW TO SEE INSET. BLACKCOMB MOUNTAIN WHISTLER MOUNTAIN. SLOW ZONES. Keep an eye out for our Mountain Safety. Team in their bright yellow jackets monitoring. the Slow Zones. Slow Zones are in effect.