Yellowstone River

September 20, 2020

Fishing Conditions

September 20, 2020

The stone is running around 1880cfs but still proceed with caution when floating as wave trains and hydraulics are nasty in some sections. Water temps are looking great and should drop more with an extended forecast that looks promising with much colder overnights. Hoppers aren't our first choice of flies right now, but if it warms back up we might see a few more big browns eating them on top. For dry fly fishing, look for BWOs, as these cloudier days have had fish looking up. If its slow on top, try throwing a selection of nymphs. Stoneflies, worms, soft hackles, and attractor mayflies are all on the menu. We have had some good reports from anglers getting fish on streamers as well. Time to break out the big rods and sink tips! Natural colors such as olive, white and black seem to be the hot colors. Size and profile have been varying day to day with the weather. Dead drifting a sculpin or baitfish under a bobber has also  resulted in some nice fish hitting the net. Before you go, be sure to check out your boat ramp options, most are in good shape but some tend to change quite a bit after the runoff. 

Carbella fishing access and campground will be closed September 9th to November 18th due to renovations.


Text "Troutfitters" to 313131 for automatic fishing report updates right to your phone.

Fly Pattern Suggestions

Dries: Griffiths Gnat: 16-18, Matts Midge: 18, Purple Haze: 16-18, Purple Para Wulff: 16-18, Adams Para Wulff: 16-18, Elk Hair Caddis; 14-16, Chubbies: 8-14, Hi-Vis PMD; 16-18, Para-Sulfer PMD; 16-18, Triple Decker Hopper Tan & Club; 8-14, Yeti Hopper; 8, Water Walkers; 10-16, CFO Ants Black & Red; 12-16, Hippy Stomper; 12-16, Morrish Hopper; 6-12

Nymphs: Copper John Black, Blue: 16-18, Rubberlegs Coffee, Turd: 6-8, Delektable Brown Stone: 6-8-10, Mega Prince: 4-6-8, Prince Nymph: 14-18, Pyscho Prince Purple: 14-16, Pheasant Tail: 12-18, Hares Ear: 12-18, Nymphicator: 12-16, Purple Berger: 12-14-16, Tungsten Sunkist: 14-16-18, Olive Soft Hackle: 18-20,

Streamers:Silveys Sculpin Black 2, Eric's Jealousy Black 2, Lawn Mower Black 1, Natural Copper Zonker, T&A Bunkers Olive/White, Rainbow & Whitefish: 2 Swimmin Jimmy Rainbow: 2 Sex Dungeon White, Yellow: 2 Fathead White, Yellow, Olive, Black: 2 Silvey's Sculpin Natural, black, olive, silver:4 Circus Peanut tan, olive, black: 4 Lawn Mower yellow, white, olive: 4 Game Changer rainbow, white: 4 Erics Jealousy yellow, black, white: 4 Sculpzilla black, natural, olive, white: 4-6 Mr. Creepo black, tan: 6 Craven's Dirty Hippie: 4 JJ Special: 4-8 Belly Ache Minnow Natural, Olive:4-6, Baby Gonga: 8


Click to enlarge

More USGS Water Data

Enter your number below to receive new, up-to-date river reports from Montana Troutfitters.


Processing...