Ice Age Floods National Geologic Trail
Montana, Idaho, Oregon, Washington
Tonight
🌗 46% moon
5.2 h fully dark
Open today
Open
Entrance
Free entry
At the end of the last Ice Age, 18,000 to 15,000 years ago, an ice dam in northern Idaho created Glacial Lake Missoula stretching 3,000 square miles around Missoula, Montana. The dam burst and released flood waters across Washington, down the Columbia River into Oregon before reaching the Pacific Ocean. The Ice Age Floods forever changed the lives and landscape of the Pacific Northwest.
No entrance fee.
Hours & seasons
The Ice Age Floods National Geologic Trail is a collection of sites operated and owned by a variety of partners. , Hours of operation and season will vary from site to site. Please check each respective site for more details and information.
Generally open:
winterspringsummerfallHours are reported by the park — verify before you go.
📞 (509) 237-9722
✉ iafl_program_manager@nps.govConditions
Weather now: ☀️ Clear, 92°F
☀️ 94°/55°
☀️ 98°/64°
☁️ 98°/66°
Log a sky reading
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Live conditions
Sun Lakes Dry Fall State Park ↗inactive
Accessibility
13 audio-described place(s)
Reported by the park — verify before you go.
Not an official safety source — always defer to NPS.gov and rangers for life-safety decisions.
By the numbers
A visual read on Ice Age Floods National Geologic Trail — its character, trails, sky, and weather.
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3-day forecast
Daily high and low temperatures (°F).
Passport stamps
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🎫 Columbia Gorge Discovery Center & Museum
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🎫 Fort Spokane Visitor Center and Museum
🎫 Fort Spokane Visitor Center and Museum
🎫 Grand Coulee Dam Visitor Center
🎫 Montana Natural History Center
🎫 Multnomah Falls and Lodge
🎫 National Bison Range
🎫 Ravalli County Historical Museum
🎫 Sun Lakes-Dry Falls State Park
🎫 Tualatin Public Library
Places to see
Back to Trailhead Park
Badger Mountain Trail Head
Beacon Rock
audio
Bowl and Pitcher (Riverside State Park)
Bull Lake
Cabinet Gorge Dam
Candy Mountain
Candy Mountain Trailhead
Cape Disappointment State Park
audio
Cape Disappointment State Park-Lewis and Clark Interpretive Center
audio
Clark Fork Ice Dam
Coffeepot Lake Recreation Area
Audio & media
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🎬
🖼
Learn more
Volcanic necks are the remnants of a volcano’s conduit and plumbing system that remain after most of the rest of the volcano has been eroded away.
How Ice Age Floods National Geologic Trail connects
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