If you are a fly fisher, coming to Colorado and don't bring your gear, you should have your head examined. With that in mind, this isn't the best time to fly fish in Colorado. All of the still water across the state will be frozen. Some moving water will be difficult to fish because of ice depending on location.
Your best bet for a location close to Denver would be the South Platte River at Deckers or if you want to walk a bit, the South Platte in Cheesman Canyon is an excellent choice. It is upstream from Deckers a few miles.
You will probably find midge hatches on the Platte. It might be a bit early for others to hatch but you can drift a small nymph through pocket water.
If you go to Deckers on a weekend, be sure to take your own rock to stand on. There is about one mile of river water above the town of Deckers and the lower boundary for the Wigwam Fly Fishing Club. This is where you will find a lot of anglers.
I learned to fly fish in this section of the river forty years ago but after the movie, "A Yuppie Runs Through It" was released, I concentrated on the river below the town.
There is another section of the South Platte closer than Deckers and that is Waterton Canyon. It is the last stretch of good trout water before the river heads out on the plains. The canyon is only accessible by bicycle, foot or horse. It is six miles long. The upper three miles have special regulations; whereas, the lower three are standard regs. You will see more people fishing the lower section. The road following the river is very good and not steep. If you have a bicycle, you can reach the six mile mark in about thirty minutes. The problem with the canyon in general, especially the upper section is ice. Canyon walls are steep and don't allow a lot of sun this time of year.
Last edited by Bucksnort; 03-11-2018 at 11:23 AM.