The thickness of stable snow cover in the region is generally 70-80cm and the thickest can be 200-300cm.

• 据观测资料表明，达坂山地区是青海省境内降水最多的地区，公路垭口段降水量大、冷季降雪多、雪层较厚，稳定积雪时间长达180-200天。