Rainbow Mountain Summit, N Glacier

Skied to 🌈 summit from the usual approach (Callaghan). Low down we carried the skis a bit after the xc trails. In the trees was icy, ski crampons mandatory, did not corn up in afternoon. At Hanging Lake, rain crust/fully consolidated snow turned to dust on firm ?rain crust with some apparently new small runnels visible on the surface near the lake. Above 1500 m, no runnels evident. Also above 1500 m, dust on crust became styrofoam with variable soft surface or firm icy/rimy surface. Some softening on steeper W/SW aspects later in the day, with shaded/lower angle slopes not softening. On north glacier, pleasant Styrofoam skiing with minimal icy spots/rime compared to S aspect. No whumphing or shooting cracks; however between 1400 and 1500 m some settling of snow directly under skis only.