Alpine and subalpine terrain near Noisy Basin, Mont. |
Forest clearing on hillside at snowpack-sampling site at Noisy Basin, Mont. |
Snowmobile trail into Noisy Basin, Mont. |
Deep snow makes for difficult access into Noisy Basin, Mont. |
Workers do avalanche stress test in snowpit at Noisy Basin, Mont. |
Workers stand in bottom of deep snowpit at Noisy Basin, Mont. |