Big Four is a 6,160+ feet (1,880+ m) mountain summit in the Cascade Range, located about 20 miles (32 km) east of Granite Falls, Washington. It is situated 4 miles (6.4 km) west of Barlow Pass along the Mountain Loop Highway, near the Monte Cristo area, on land administered by the Mount Baker-Snoqualmie National Forest. Debris piles on the mountain's northern flank form as a result of avalanche activity. These fields of disturbed snow are able to remain year round in the shadow of the mountain. During the summer months snow-melt streams flow beneath the debris piles and cause caves to form in the ice. The caves vary in size from season to season and are unpredictably dangerous. The mountain is open to the public and a large snowfield can be reached by a short trail, but the snowfield itsel