Decades after Mount St. Helens' eruption sent almost 90 billion cubic feet of debris into the upper Toutle Valley, sediment ...

One of California's latest national monuments is an enormous, pristine section of mountains, lakes, and lava flows in the ...

Now Washington State officials are looking over state plans for evacuation and other plans in case of a big eruption at Mt.

Recent increased seismic activity at Mt. Adams has brought state, tribal, and federal leaders together to reassess their eruption plans.

At Mount St. Helens, volcano monitoring and trail maintenance efforts are set to degrade without help from federal agencies.

The sediment retention dam in Toutle has become less and less effective as it fills, switching from catching about 80% of passing sediment to allowing 80% to pass, according to ...

MOUNT ST. HELENS, Wash. (KATU) — Snowmobilers, including one with a serious leg injury, were rescued following an avalanche on Mount St. Helens on Feb. 17. The incident occurred when three ...

PORTLAND, Ore. (KOIN) — After an avalanche on Mt. St. Helens left one snowmobiler stuck and another injured, a fellow snowmobiler managed to aid them before calling in a rescue group on Monday.

Identifying a solution that maintains safe water levels of Spirit Lake while addressing the resources and values present in ...

Nearly 45 years after Mount St. Helens’ eruption sent almost 90 billion cubic feet of debris into the upper Toutle Valley, millions of tons of sediment still pour into the Cowlitz River each year.

MOUNT ST. HELENS (KPTV) - A snowmobiler with an injured leg was rescued the afternoon of Monday Feb. 17 after an avalanche on Mount St. Helens, according to authorities. Around 2 p.m., three ...