This is a great time of year to fish the Park. While the valleys surrounding Yellowstone can get quite hot, the Park has cooler temps at it's higher elevation. The northest corner is fishing great with the cool weather. Early morning is time to fish small PMD's. When the air finally starts to warm the hopper fishing will begin to pick up steam. The fish are also targeting crickets hard in this area of the Park. If a breeze comes up and your near some willows put on an ant. It is still good to have a PMD emerger dropped under your hopper pattern. The Yellowstone River would be my next choice if I wasn't going into the Lamar Valley area. The PMD's are out but are tiny now. Stimulators, hoppers and ants are your mid-day patterns here too. The west side of the Park has some fishable water temps again on the Gibbon and Madison. Early or late in the day are the best times to be on the rivers in this area. It would be good to only fish the Firehole for the first couple hours of daylight while thing are cool.
Dries: Elk Hair Caddis/ Tan, Gray: 12-14-16, Snowshoe Caddis/ Tan: 14-16-18, Comparadun PMD: 16-18-20, Brook Sprout: 16-18-20, Chubby/ Olive, Golden: 12-14-16, Tilt Wing PMD: 16-18, Hackle Stacker PMD: 16-18, Snowshoe Sally: 14-16, Pearl Butt Trico:20-22, Hackle Stacker Trico: 20-22, Morrish Hopper: 8-10-12-14-16, Amy's Ant: 10-12-14, Attract-ant Black/Red: 10-12, CFO Ant: 12-14-16
Nymphs: Green Machine PT: 16-18-20, Rootbeer Float PMD: 18-20, Batwing Emerger PMD: 16-18, Military Mayfly: 16-18, Pat's Rubber Legs/ Olive, Black, Brown: 8-10-12, BH FB Pheasant Tail: 12-14-16-18, Hare's Ear: 12-14-16-18
Streamers: Zonker/ Tan, Pearl, Black: 4-6-8, Lil' Kim/ Silver: 4, Dirty Hippy/ Rainbow: 2
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