Hikers should avoid Avalanche Pass due to mud and rockslides. Crews are working to clear the trails and ensure safe passage.

The breakthrough came in 1980 after Mount St. Helens erupted and part of the mountain collapsed, sending a debris avalanche sliding northward.

A pair of mountaineering rangers on an acclimatization climb saw Vizzini’s partner atop the avalanche debris. They reached the site in minutes, starting a signal search that quickly found ...