The Alluvial Fan waterfall at Rocky Mount Nat'l Park was definitely one of my favorite sites. I could have watched and explored it for hours. There is just something special about seeing the water cascade down. Of course, I'm a rock person..love rocks of all sizes so I couldn't resist all the cool shots of rocks that I could take with my camera. . . . And no I did not take a rock sample home with me. I did buy some polished rocks at the visitor center though. The fan and waterfall was created in the 80's I think by a very large flood caused by snow melt.