The western, eastern and northern flanks of Hoodoo Mountain are covered by two valley glaciers known as the Hoodoo and Twin glaciers, while Hoodoo's southern flank, which extends down to the floodplain of the Iskut River, is free from glacial ice.
Hoodoo Glacier on the volcano's western flank extends at the head of the Hoodoo River, while the Twin Glacier on Hoodoo's northern and eastern flanks lies at the headwaters of the Twin River.
In the past, Hoodoo Mountain has been covered by glacial ice more than 2 km (1 mi) thick.

The meltwater from the Hoodoo Glacier drains into the Hoodoo River while meltwater from the Twin Glacier drains into the Twin River.
These two relatively small rivers are a source for the much larger Iskut River, flowing from the southern flank of Hoodoo Mountain respectively.
Runoff from the Hoodoo and Twin glaciers and those on surrounding mountains is a source of fresh water for major salmon habitats and fisheries on the Iskut and Stikine rivers.
The western, eastern and northern flanks of Hoodoo Mountain are covered by two valley glaciers known as the Hoodoo and Twin glaciers, while Hoodoo's southern flank, which extends down to the floodplain of the Iskut River, is free from glacial ice. Hoodoo Glacier on the volcano's western flank extends at the head of the Hoodoo River, while the Twin Glacier on Hoodoo's northern and eastern flanks lies at the headwaters of the Twin River. In the past, Hoodoo Mountain has been covered by glacial ice more than 2 km (1 mi) thick.
The meltwater from the Hoodoo Glacier drains into the Hoodoo River while meltwater from the Twin Glacier drains into the Twin River. These two relatively small rivers are a source for the much larger Iskut River, flowing from the southern flank of Hoodoo Mountain respectively. Runoff from the Hoodoo and Twin glaciers and those on surrounding mountains is a source of fresh water for major salmon habitats and fisheries on the Iskut and Stikine rivers.
Hoodoo Mountain