Fly Fishing Reports For Boulder Colorado

We realize that for most folks, fly fishing is a passion you enjoy on the weekends, after work, or when the conditions justify calling in sick! You want to maximize your time when you do get an opportunity to get out to your favorite spot. That’s exactly why we strive to keep our Boulder fly fishing reports up to date more than any other shop in the region. No more spending half of your outing trying to figure out why the fish keep refusing your fly!

Fishing Around Boulder In A Nutshell

Boulder Creek See Full Report

Barker Reservoir started spilling over on 5/9, opening up some good water in the upper stretches of the canyon (above the falls.) The section between Fourmile and the falls is still fishable, but is definitely high. We’re getting more and more dry fly action as we get further into Spring. One of our most successful rigs right now is a dry dropper combo using a Chubby Chernobyl with a small rainbow warrior dropped underneath. With all the off-color water, some type of worm pattern is a good bet to keep in the starting lineup.

Boulder Creek Water Flow Graphs

South Boulder Creek See Full Report

South Boulder Creek below Gross has come back up to the 25 CFS range, which is still a bit low, but workable. This is the perfect flow for working a dry dropper rig. Try something along the lines of a J.C. special, small PMX or if there are BWOs out, a Mole Fly up top with about a two and a half foot dropper.

Another option would be the Eldorado State Park section, as the flows are at a nice 70 CFS. If you’re willing to venture further out, you could do some exploring above Gross Reservoir, as the inlet flows are up, and fish should be spread out nicely.

Water levels have come down some in the upper stretches of S. Boulder around Pinecliffe, so while it’s big water right now, and wading has been challenging, we’ve been getting good reports.

A dry-dropper rig will be a great way to run a nymph while still enticing those fish that are willing to play up to the top. Good options for the dry would be small PMX’s, Adams, and Purples Hazes. Underneath good options would be Olive or Grey RS2’s, Copper Johns, BTS Baetis, Frenchies, WD 50’s, small 20 Inchers, and Bishop’s Dynamite.

South Boulder Creek Water Flow Graphs

Clear Creek See Full Report

Flows are cranking through the canyon at over 600 CFS, so be careful trying to wade. Luckily lots of the water on clear creek is easily accessible from the shore. This is where a 10′ rod really shines. Look for fish in slack water behind structure or up against the bank in a foot or less of water. Worm, Stonefly, Midge and Caddis imitations are all pulling fish.

Clear Creek Water Flow Graphs

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Big Thompson See Full Report

With South Boulder Creek dropping in levels on 5/6, the Big Thompson became one of the better close to home options on the Front Range. The dry-fly bite has been solid, which makes it even better. We’ve been having the best luck on #20 adams and Mole Flies up top with UV emergers, soft hackle sow bugs and calico midges trailed below. You’ll have the best success of you use 6-7x tippet.

Big Thompson River Water Flow Graphs

Blue River See Full Report

Flows started ramping up on 5/7 and were holding steady at 740 CFS in Silverthorne, but have have now doubled to 1300 CFS. That’s going to make wading a pretty tough proposition. The lower Blue below Green Mountain is also high but still somewhat wadeable.
Concentrate your efforts on the edges and any soft pockets you can find. With flows this high you can finally give 4x and 5x a spot on the starting lineup. With the bump in flows more shrimp are going to be dumped into the buffet line, so try to always work a Mysis pattern into the mix. It’s also a great flow to try heavy worm patterns like the Vegas Weekend or Jakes DB worm.

Blue River Water Flow Graphs