Low and clear are the waters of the Saint Vrain this time of year. The South branch will be icy and tough to find open water on for the next few, and is best left alone, although it is a pretty drive. Below Button Rock has been fishing good with small flies and light tippets. Try some 6x and size 20-24 midges under indicators. Caddis larva can be good as a point nymph, along with smaller stones. The fishing here gets going in late winter when midges get thicker in late february. The best fishing continues to be in around the town of Lyons. The sun hits the water and warms it just enough to keep the river a bit more alive. There is better bug activity, and the fish are both larger and more active. Try leeches, san juans, copper johns, zebra midges, caddis larva, and streamers stripped slow along the bottom. Town is the best for now, and moving upstream the fishing will get better as the days get longer. March can be a great month on the Vrain.