A mile south of Washtuchna, Washington, State Road 261 – which has been curling through close hills – suddenly straightens and drops down the wide Washtuchna Coulee. On either side of the road the land sweeps up to rocky outcroppings and ledges. Drive 60 mph and you’re shooting across the landscape at about the speed of the ice age floodwaters that first tore open this former river channel some 15,000 years ago.
Ice Age Floods National Geologic Trail
The Ice Age Floods National Geologic Trail is the first of its kind. It's a trail whose hallmark is geology. And what geology that is.
The Ice Age Floods National Geologic Trail, America’s first national geologic trail, was established to interconnect sites in four western states that interpret the geologic consequences of some of the biggest floods this planet has ever produced.