For years my friend and fellow photographer Keith Walklet and I have been debating this question: When is the best time to photograph Horsetail Fall (at right)? Sometime in February, for sure, but when exactly? Keith thought it was closer to the middle of the month, while I always maintained that it was later. To get the answer, I was able to gain unique access to archives from one of the Yosemite Association’s web cams. And the answer is… around February 12th to 22nd. So Keith was probably closer to being right than I was, but there are a lot of variables. You can read a full-length article on my web site that explains all the details.