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 Flo
Free — you won’t need your pass here.
Free entry — there is no entrance fee here, so you won’t need your pass to get in.
- Fee type No fee — No fee is charged here.
- HoursThe 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 det
- Source National Park Service ↗
- Last verifiedJuly 6, 2026 · Confirmed
- Official pagewww.nps.gov ↗
- Contact (509) 237-9722 · iafl_program_manager@nps.gov
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 Colum
Common questions
Quick Yes / No / Depends answers for Ice Age Floods National Geologic Trail — always confirm with the managing site before you go.
No Is there a fee at Ice Age Floods National Geologic Trail?
No — it’s free to enter, so you won’t need your pass to get in.
Yes Can you kayak, paddle, or boat here?
Yes — there’s water for boating and paddling at Ice Age Floods National Geologic Trail. Hand-launched craft usually need no permit; motorized boats may need registration or a launch fee.
Yes Are there hiking trails?
Yes — hiking is one of the listed activities at Ice Age Floods National Geologic Trail.
Depends Can you bring a dog?
Usually only leashed and in developed areas, campgrounds, and paved paths — not on most trails or in buildings. Pet rules vary by park, so check first.
No Are drones allowed?
No — launching, landing, or operating drones is prohibited on National Park Service land.
Depends What are the 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 det
Nearby sites
Scooteney Reservoir
CheckReclamation honors the pass at only a handful of sites — confirm before you rely on it here.
Takashishin / CC BY 4.0 · Wikimedia Commons U.S. Army Corps of Engineers Lake West
CheckArmy Corps site — the pass gives 50% off day-use fees only and never covers camping. Confirm at the gate.
