Up in Rocky Mountain National Park:
:
This is the West Alluvial Fan campground at Rocky Mountain National Park. You can see just the top of the sign. All that material, 10 or 15 feet deep, came down during the September flooding, and totally cut off that campground.
This is where Old St. Vrain Road washed out along the St. Vrain River, near Lyons, Colorado. In the foreground you can see a bit of the road, and then it takes up again across the river.