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Near Park Lake Road Northeast (Washington Route 17) 2 miles south of U.S. 2, on the left when traveling south.
Flood waters, perhaps 300 feet above you, once rushed over these cliffs. During the ice age, glaciers to the north blocked the Columbia River and forced it to find a new route. The river, swollen from melting glacial ice, began to carve a new . . . — — Map (db m129678) HM
Near Park Lake Road Northeast (Washington Route 17) 2 miles south of U.S. 2, on the left when traveling south.
Raging Ice Age floodwaters carved spectacular features throughout eastern Washington, creating unique landscapes. Follow the path of the floods and discover more about this amazing story.
Gouging Deep Coulees The powerful floods cut . . . — — Map (db m129681) HM
Near State Highway 155, on the right when traveling north.
Near this site President Roosevelt, accompanied by Mrs. Roosevelt delivered the address dedicating Grand Coulee Dam. Nearly 20,000 people attended the ceremony which was preceded by an inspection of the dam’s construction. — — Map (db m99855) HM
Near Park Lake Road Northeast (Washington Route 17) 2 miles south of U.S. 2, on the left when traveling south.
You are standing in the pathway of some of the largest floods ever known. They carved steep-walled canyons, sculpted immense waterfalls, and left behind landscapes found nowhere else on earth.
Massive Glacial Dams and Lakes During the last . . . — — Map (db m129680) HM
Near Park Lake Road Northeast (Washington Route 17) 2 miles south of U.S. 2, on the left when traveling south.
These cliffs are skeletal remnants of what was once the world’s largest waterfall. They bear stark witness to the tremendous power of catastrophic floods that swept over Eastern Washington at the end of the last Ice Age.
The falls began 20 mi. to . . . — — Map (db m129677) HM
On Washington Route 17 at milepost 88,, 0.1 miles south of Moore Road Northeast, on the right when traveling north.
Indians lived in this coulee many centuries ago. You are standing on an ancient Indian camp site. The Indian trail came down the steep hill behind you and crossed the coulee to the east. The famous Cariboo Cattle Trail crossed the coulee here going . . . — — Map (db m208186) HM
Near State Highway 155, on the right when traveling north.
Grand Coulee Dam is the key structure in water utilization for the Columbia River Basin. The dam began operation in 1942 and is one of the world’s largest concrete structures. It is a mile long and contains almost 12 million cubic yards of concrete . . . — — Map (db m99853) HM
Near Park Lake Road Northeast (Washington Route 17) 2 miles south of U.S. 2, on the left when traveling south.
The sheer cliff in front of you was once the world's greatest waterfall. From here, you see only the western portion of this remarkable Ice Age floods feature. With the end of the last Ice Age, floodwaters no longer swept through Grand Coulee, . . . — — Map (db m129679) HM
