5 Tips For Fishing The Salmonfly Hatch On The Madison

Madison River Salmonflys

The annual Salmon Fly hatch on Montana’s Madison River is one of fly fishing’s most storied and anticipated events.  Salmon Fly time is hands down your best shot at landing a true trophy trout on a dry fly.  The sight of a 3 inch long insect splashing about the surface is enough to draw even the largest fish from its deep, dark lair.  Anglers from across the country descend upon Ennis, Montana in late June to try their luck as southwestern Montana becomes awash in Salmon Fly fever.  However, this hatch can be as fickle as it is famous, so let’s take a look at some tips to increase your odds for success on the Madison.

Tip #1: Timing is everything
For the visiting angler or anyone who can’t be on the river at a moments notice, timing the hatch can be the toughest part.  Generally speaking, the two week window from June 20th to July 4th is when the hatch should fall.  The bugs typically appear in the town of Ennis around the 20th and by the 25th the hatch has exploded throughout the float section up to Lyons Bridge.  These dates are just general guidelines, and both weather and water conditions can lead to early or late emergences of the big bugs.  If Montana is experiencing a big snow year or an unseasonably cold early summer, you can plan on things being pushed back a bit.  Drought years and warm weather have the opposite effect.  Things can change on the river at a moments notice and even the best laid plans can go awry, but using information on snowpack, weather, and historical trends will give you the best chance to hit the hatch.

Tip # 2: Location, Location, Location
The Madison is large river system, running over 180 miles from its headwaters in Yellowstone National Park down to its mouth at the headwaters of the Missouri in Three Forks, Montana.  While most of this run sees at least a smattering of the bugs, the heaviest hatch occurs in the reach between Quake Lake and Ennis Lake.  This stretch is referred to locally as the “Upper” Madison or the “50 Mile Riffle”.  For the wade fisherman, the stretch between Quake Lake and Lyons Bridge is a good bet because of ample public access and regulations that prohibit fishing from boats in this reach.  Lyons Bridge down to the town of Ennis is dominated by float fisherman in drift boats and rafts, although public access for wading is available at various intervals.
Floating Above Ruby Rocks
Tip # 3:  Avoid the heaviest part of the hatch
While this sounds counter intuitive, you actually want to avoid the bulk of the hatch for optimal fishing.  There are only so many giant stoneflies that will fit in a trouts’ stomach, and the fish will gorge themselves to the point where they will stop feeding.  It is not uncommon to land fish whose stomachs are visibly distended.  However, when these fish are done digesting, they will be back on the feed and certainly remember what a salmonfly looks like, even if the majority of the hatch has moved on upriver.  This is especially true for the dry fly fishing, which will be best anywhere from 3-7 days behind the hatch.  If you can get out ahead of the main hatch, nymphing is the way to go as the salmonfly nymphs will be very active underwater in preparation to hatch.  The hard part is determining where exactly the bulk of the hatch is at any given time.  Hopefully you will be on the water to determine this for yourself, but otherwise local fly shops and guides keep close tabs on the bugs.

Tip # 4:  Don’t focus solely on the banks
Whether floating or wading, the natural inclination for anglers during the hatch is to pound the banks.  After all, the bugs are thick in the bankside willows and the water is up, naturally pushing fish towards the shore.  However, two factors on the Madison make ignoring the rest of the river a mistake.  First, the Madison has an incredible amount of mid stream structure, primarily in the form of large boulders.  Second, the hatch brings heavy pressure to the river and a steady stream of anglers pounding the banks can actually draw a reaction from the fish and push them off.  That is not to say that bank fishing isn’t productive, as sometimes it is incredibly so.  Just avoid approaching the river with a one track mind and don’t be afraid to change things up.
Wading The Slide
Tip # 5:  Fish a double dry dropper rig
When I am dry fly fishing during the Salmon Fly hatch, I always fish with a second dry fly. Sometimes you can fish 2 big bugs spaced at least 2 feet apart to cover a little more water. Another option is to take advantage of a smaller dry fly as a dropper behind the big bug. Salmonflies aren’t the only bug hatching in late June, with abundant caddis and smaller stoneflies available to fish as well.  Also, the fish will sometimes become suspicious after seeing hundreds of fake size #2 flies.  I have seen many instances where a fish rises to a salmonfly pattern only to shun it in favor of a #12 attractor that was trailing behind. When you are bragging to your buddies and showing off photos of your big fish at the end of the day, which dry fly it ate isn’t going to matter, so add a dropper and double your chances.

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