Ice Age Floods National Geologic Trail

About Ice Age Floods National Geologic Trail

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.

Weather & Conditions

The National Geologic Trail is a collection of sites stretched across a four state area, the weather will vary from site to site. Please check the weather for your local region, or the region you'll be visiting, through their respective sites.

NPS Reference Location

Park state / territory membership: Washington, Oregon, Idaho, Montana. This map uses the National Park Service reference coordinate. It may represent an administrative or reference point rather than a park entrance, trailhead, visitor center, or the nearest access point. Use the official NPS directions below when planning travel.

Operating Hours

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.

Activities

Getting There

To Trail Headquarters from Spokane Take I-90 West At Exit 277, merge onto US-2 toward Davenport/Fairchild AFB/Spokane Airport Just past Wilbur, turn right onto WA-21 Stay left onto Highway 174 Turn right onto WA-155 Stay on WA-155 past Grand Coulee Dam and into the town of Coulee Dam Cross the Columbia River and continue on WA-155 Turn right onto Crest Drive and follow up the hill. The HQ Office is located on the left

Contact & Address

The NPS-listed address may be an administrative office, visitor center, mailing/contact location, or other park facility rather than a park entrance.

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