Valley of Ten Thousand Smokes Bus/Hike
What to Expect
Safety Advisory
The valley is completely treeless and exposed — weather can turn fast with zero shelter available. Hypothermia is a real risk even in summer if rain and wind combine, so pack rain gear and warm layers regardless of the forecast at Brooks Camp.
This is prime brown bear country. Bears frequent the river corridors in the valley, and you may encounter them on the canyon descent. Stay with your group, make noise, and carry bear spray. The rangers will brief you, but take it seriously — these are coastal grizzlies, not black bears.
The pumice slopes into the canyon are steep and loose. Footing is unreliable, especially on the descent to Ukak Falls. Trekking poles make a significant difference, and one wrong step on wet ash can send you sliding.
Trail Details
Pro Tips
Book the Valley of Ten Thousand Smokes bus tour through Katmailand as early as possible — there's only one departure per day, seats are limited, and it fills up fast in July. The bus leaves Brooks Camp around 9 AM and returns by early evening.
Layer up even in summer. The valley sits at elevation with zero wind protection, and temperatures can swing 20 degrees between the bus stop and the canyon floor. A windbreaker and fleece are non-negotiable, plus sturdy boots with ankle support for the loose pumice descents.
If you want to explore beyond the guided portion, tell the ranger at departure — experienced hikers can break off from the group to reach the Novarupta lava dome or wander the ash flats solo. The light in the canyon around midday creates otherworldly contrast for photography, especially where the River Lethe cuts through banded ash layers.
