Fishing Conditions: GOOD

Report Rating: GOOD
Crowd Rating: Crowded
Crowded

Fly Fishing Report Date:

Wednesday, Jul 17, 2019

Weather & Water Conditions

Weather Water
Temp: 60+ Temp: 44-47
Sky: Clear Flow: 650
Wind: None Clarity: Slightly Off
Precip: None Runoff: No 

Colorado Stream Update: The Juan is giving some banner days

Current Conditions at San Juan:

Flows continues to sit around 600 CFS on the quality waters. Fish have setup nicely and trout have been caught both on the surface and beneath. Patterns like bling midges, nightmare midges, and annelids have found some very nice trout lately. There are opportunities for the dry fly angler, however most eats remain subsurface. Remember that the Juan is a very technical tail-water. To find success, adjusting depth and tippet size can make a big difference.

The tail waters are fishing well with midge and micro mayfly patterns. Float fishing trips have been doing well. The river is flowing good and clear, float trips have been hooking lots of fish using nymph rigs and dry flies.  The fishing is good.  Clear skies and 60+ degree weather. The water temperature was between 44-47 degrees and Slightly Off.

Angling University: Up your game.
The Flyfisher Guide Service
The Colorado Trout Fisher Guide Service
Colorado Fly Fishing Trips with
Colorado Trout Fisher
Denver and Boulder Fly Fishing Guides
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BOOK A TRIP

Trip Includes:
  • Flies and fishing tackle
  • Rods/reels
  • Waders
  • Lunch
  • Transportation
$225 for 1 or 2 people
$295 for 3 people
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Likely Catch

Species: Brown
Weight: 2 lbs 12 oz
Length: 17 inches
Girth: 7 inches
Brown Trout Female Brown Trout Female
Brown Trout Male Brown Trout Male

Current Insect Hatches at San Juan

Insect Type: Midge

Insect: Black Midge

Color: Black

Size: 22

Time: PM

Black Midge Larva Illustration
Black Midge Emerger Illustration
Black Midge Adult Illustration

Insect Type: Mayfly

Insect: Micro Blue Winged Olive (BWO)

Color: Olive

Size: 22

Time: PM

Micro Blue Winged Olive (BWO) Emerger Illustration
Micro Blue Winged Olive (BWO) Nymph Illustration
Micro Blue Winged Olive (BWO) Adult Illustration

Recommended Flies for San Juan

Fly: Black Beauty
Color: Black
Size: 22
Time: All Day
Black Beauty Black Beauty
Fly: Disco Midge
Color: Red
Size: 20
Time: All Day
Disco Midge Disco Midge
Fly: Juju Baetis
Color: Brown
Size: 20
Time: All Day
Juju Baetis Juju Baetis

Colorado Hatch Conditions for Late July

Caddisflies
Insects: Green Sedge
Color: Olive to Gray Brown
Dates: Jul 15 – Sep 30
Emergence: Morning & Afternoon
Size: 12-14
Spinner Fall: NA
Green Sedge Larva illustration
Green Sedge Emerger illustration
Green Sedge Adult illustration
Illustrations © The Flyfisher Group 
Insects: Little Black Sedge
Color: Chocolate to Black
Dates: Jul 15 – Sep 30
Emergence: Sporadic
Size: 16-18
Spinner Fall: NA
Little Black Sedge Larva illustration
Little Black Sedge Emerger illustration
Little Black Sedge Adult illustration
Illustrations © The Flyfisher Group 
Insects: Little Plain Brown Sedge
Color: Brown to Chocolate
Dates: Jun 15 – Aug 30
Emergence: Sporadic
Size: 14-16
Spinner Fall: NA
Little Plain Brown Sedge Larva illustration
Little Plain Brown Sedge Emerger illustration
Little Plain Brown Sedge Adult illustration
Illustrations © The Flyfisher Group 
Insects: Little Sister Sedge
Color: Green to Greenish Brown
Dates: May 15 – Aug 30
Emergence: Afternoon & Evening
Size: 14-16
Spinner Fall: NA
Little Sister Sedge Larva illustration
Little Sister Sedge Emerger illustration
Little Sister Sedge Adult illustration
Illustrations © The Flyfisher Group 
Insects: Little Tan Short Horn Sedge
Color: Dark Brown to Yellow
Dates: Mar 1 – Aug 30
Emergence: Sporadic
Size: 14-16
Spinner Fall: NA
Little Tan Short Horn Sedge Larva illustration
Little Tan Short Horn Sedge Emerger illustration
Little Tan Short Horn Sedge Adult illustration
Illustrations © The Flyfisher Group 
Insects: Little Western Dark Sedge
Color: Dark Brown
Dates: Jun 1 – Aug 15
Emergence: Mid Day
Size: 16-18
Spinner Fall: NA
Little Western Dark Sedge Larva illustration
Little Western Dark Sedge Emerger illustration
Little Western Dark Sedge Adult illustration
Illustrations © The Flyfisher Group 
Insects: Micro Caddis
Color: Yellow, Orange or Brown
Dates: Jun 15 – Oct 15
Emergence: Sporadic
Size: 20-22
Spinner Fall: NA
Micro Caddis Larva illustration
Micro Caddis Emerger illustration
Micro Caddis Adult illustration
Illustrations © The Flyfisher Group 
Insects: Spotted Sedge
Color: Brownish Yellow
Dates: May 15 – Sep 30
Emergence: Sporadic
Size: 10-12
Spinner Fall: NA
Spotted Sedge Larva illustration
Spotted Sedge Emerger illustration
Spotted Sedge Adult illustration
Illustrations © The Flyfisher Group 

Mayflies
Insects: Blue Winged Olive
Color: Light Olive Brown to Brown Olive
Dates: Mar 1 – Nov 15
Emergence: Clouds & warmest part of day
Size: 16-18
Spinner Fall: Evening
Blue Winged Olive Nymph illustration
Blue Winged Olive Emerger illustration
Blue Winged Olive Adult illustration
Illustrations © The Flyfisher Group 
Insects: Callibaetis Speckled Dun
Color: Tannish Olive to Olive Gray
Dates: Jun 1 – Aug 30
Emergence: Cloudy, Late Morning
Size: 14-16
Spinner Fall: Late Afternoon
Callibaetis Speckled Dun Nymph illustration
Callibaetis Speckled Dun Emerger illustration
Callibaetis Speckled Dun Adult illustration
Illustrations © The Flyfisher Group 
Insects: Early Pale Morning Dun (PMD)
Color: Olivish Yellow to Yellowish Pink
Dates: Jun 1 – Sep 15
Emergence: Mid Morning to Early Afternoon
Size: 16-22
Spinner Fall: Late Evening
Early Pale Morning Dun (PMD) Nymph illustration
Early Pale Morning Dun (PMD) Emerger illustration
Early Pale Morning Dun (PMD) Adult illustration
Illustrations © The Flyfisher Group 
Insects: Ginger Quill
Color: Pale Cream to Whitish
Dates: Jul 1 – Sep 15
Emergence: Morning
Size: 14-16
Spinner Fall: Evening
Ginger Quill Nymph illustration
Ginger Quill Emerger illustration
Ginger Quill Adult illustration
Illustrations © The Flyfisher Group 
Insects: Gray Drake
Color: Gray
Dates: Jun 1 – Nov 30
Emergence: Late Morning
Size: 14-16
Spinner Fall: Evening
Gray Drake Nymph illustration
Gray Drake Emerger illustration
Gray Drake Adult illustration
Illustrations © The Flyfisher Group 
Insects: Iron Blue Quill
Color: Light Olive Tan to Blue Gray
Dates: Jun 1 – Aug 15
Emergence: Warmest part of day
Size: 20-22
Spinner Fall: Evening
Iron Blue Quill Nymph illustration
Iron Blue Quill Emerger illustration
Iron Blue Quill Adult illustration
Illustrations © The Flyfisher Group 
Insects: Micro Blue Winged Olive (BWO)
Color: Pale Olive Green to Blue Gray
Dates: Jun 1 – Nov 30
Emergence: Clouds & warmest part of day
Size: 22-26
Spinner Fall: Evening
Micro Blue Winged Olive (BWO) Nymph illustration
Micro Blue Winged Olive (BWO) Emerger illustration
Micro Blue Winged Olive (BWO) Adult illustration
Illustrations © The Flyfisher Group 
Insects: Red Quill
Color: Reddish Brown
Dates: Jun 15 – Sep 30
Emergence: Mid Morning
Size: 14-16
Spinner Fall: Evening
Red Quill Nymph illustration
Red Quill Emerger illustration
Red Quill Adult illustration
Illustrations © The Flyfisher Group 
Insects: Slate Winged Drake
Color: Brown to Slate Gray
Dates: Jun 15 – Aug 1
Emergence: Early Afternoon
Size: 16-12
Spinner Fall: Evening
Slate Winged Drake Nymph illustration
Slate Winged Drake Emerger illustration
Slate Winged Drake Adult illustration
Illustrations © The Flyfisher Group 
Insects: Trico
Color: Black
Dates: Jul 15 – Sep 15
Emergence: Morning
Size: 22-26
Spinner Fall: Early Afternoon
Trico Nymph illustration
Trico Emerger illustration
Trico Adult illustration
Illustrations © The Flyfisher Group 
Insects: Western Green Drake
Color: Dark Olive
Dates: Jun 1 – Aug 1
Emergence: Cloudy, 1-4 pm
Size: 8-12
Spinner Fall: Evening
Western Green Drake Nymph illustration
Western Green Drake Emerger illustration
Western Green Drake Adult illustration
Illustrations © The Flyfisher Group 

Midges
Insects: Black Midge
Color: Blackish to Black
Dates: Apr 1 – Nov 15
Emergence: All Day
Size: 18-20
Spinner Fall: 2-3 Hours
Black Midge Larva illustration
Black Midge Emerger illustration
Black Midge Adult illustration
Illustrations © The Flyfisher Group 
Insects: Chocolate Brown Midge
Color: Brown to Chocolate
Dates: Feb 15 – Dec 15
Emergence: All Day
Size: 20-22
Spinner Fall: 2-3 Hours
Chocolate Brown Midge Larva illustration
Chocolate Brown Midge Emerger illustration
Chocolate Brown Midge Adult illustration
Illustrations © The Flyfisher Group 
Insects: Micro Black Midge
Color: Blackish to Black
Dates: Mar 1 – Nov 15
Emergence: Morning
Size: 22-26
Spinner Fall: 2-3 Hours
Micro Black Midge Larva illustration
Micro Black Midge Emerger illustration
Micro Black Midge Adult illustration
Illustrations © The Flyfisher Group 
Insects: Snow Midge
Color: Gray to Charcoal
Dates: Jan 1 – Dec 31
Emergence: Warmest part of day
Size: 24-28
Spinner Fall: 2-3 Hours
Snow Midge Larva illustration
Snow Midge Emerger illustration
Snow Midge Adult illustration
Illustrations © The Flyfisher Group 

Stoneflies
Insects: Giant Golden
Color: Brownish Yellow
Dates: Jun 1 – Aug 1
Emergence: Follows Salmonflies
Size: 14-18
Spinner Fall: NA
Giant Golden Nymph illustration
Giant Golden Adult illustration
Illustrations © The Flyfisher Group 
Insects: Micro Yellow
Color: Greenish Yellow to Yellow
Dates: Jun 1 – Aug 30
Emergence: 46-54° Water Temps Morning
Size: 18-22
Spinner Fall: NA
Micro Yellow Nymph illustration
Micro Yellow Adult illustration
Illustrations © The Flyfisher Group 
Insects: Winter Black
Color: Black Brown to Reddish Olive, Mottled Brown
Dates: Apr 1 – Aug 15
Emergence: Cold Mountain Streams and Small Ponds
Size: 18-22
Spinner Fall: NA
Winter Black Nymph illustration
Winter Black Adult illustration
Illustrations © The Flyfisher Group 
Insects: Yellow Sally
Color: Pale Yellow to Pinkish Yellow
Dates: Jun 15 – Aug 30
Emergence: Morning to Early Afternoon
Size: 2-8
Spinner Fall: NA
Yellow Sally Nymph illustration
Yellow Sally Adult illustration
Illustrations © The Flyfisher Group 

Terrestrials
Insects: Beetle
Color: Brownish to Black
Dates: May 1 – Nov 30
Emergence: All Day
Size: 10-18
Spinner Fall: NA
Beetle illustration
Illustrations © The Flyfisher Group 
Insects: Black & Red Ant
Color: Red & Black
Dates: Jul 1 – Sep 30
Emergence: All Day
Size: 18-20
Spinner Fall: NA
Black & Red Ant illustration
Illustrations © The Flyfisher Group 
Insects: Black Ant
Color: Black
Dates: May 1 – Nov 15
Emergence: All Day
Size: 20-24
Spinner Fall: NA
Black Ant illustration
Illustrations © The Flyfisher Group 
Insects: Cricket
Color: Brownish Olive to Black
Dates: Jun 1 – Nov 30
Emergence: Twilight & Dusk
Size: 8-16
Spinner Fall: NA
Cricket illustration
Illustrations © The Flyfisher Group 
Insects: Dog Day Cicadas
Color: Black & Orange
Dates: Jul 1 – Aug 31
Emergence: Varied
Size:
Spinner Fall: NA
Dog Day Cicadas illustration
Illustrations © The Flyfisher Group 
Insects: Grasshopper
Color: Green to Brownish Tan
Dates: May 15 – Nov 15
Emergence: All Day
Size: 2-14
Spinner Fall: NA
Grasshopper illustration
Grasshopper illustration
Illustrations © The Flyfisher Group 
Insects: Red Ant
Color: Red to Orangish
Dates: May 1 – Oct 15
Emergence: All Day
Size: 18-22
Spinner Fall: NA
Red Ant illustration
Illustrations © The Flyfisher Group 


Current Conditions

Clear
Currently: Clear Sky
Temperature:  89 F
Temp Max:  93 F
Temp Min:  86 F
Humidity: 15%
Wind: 18 W mph
Pressure: 1021
Clear Saturday 9:00PM — 78 ℉
Expect clear sky with temperatures ranging between 78 and 78 ℉.
Wind: 26 NW mph; Humidity: 12%; 
Clouds Sunday 6:00AM — 63 ℉
Expect few clouds with temperatures ranging between 63 and 63 ℉.
Wind: 17 NE mph; Humidity: 18%; 
Clear Sunday 9:00AM — 74 ℉
Expect clear sky with temperatures ranging between 74 and 74 ℉.
Wind: 10 E mph; Humidity: 16%; 
Clear Sunday 12:00PM — 86 ℉
Expect clear sky with temperatures ranging between 86 and 86 ℉.
Wind: 18 WSW mph; Humidity: 11%; 
Clear Sunday 3:00PM — 91 ℉
Expect clear sky with temperatures ranging between 91 and 91 ℉.
Wind: 35 W mph; Humidity: 9%; 
Clear Sunday 6:00PM — 91 ℉
Expect clear sky with temperatures ranging between 91 and 91 ℉.
Wind: 39 W mph; Humidity: 9%; 
Clear Sunday 9:00PM — 79 ℉
Expect clear sky with temperatures ranging between 79 and 79 ℉.
Wind: 27 WNW mph; Humidity: 15%; 
Clouds Monday 6:00AM — 64 ℉
Expect scattered clouds with temperatures ranging between 64 and 64 ℉.
Wind: 24 NE mph; Humidity: 36%; 
Clouds Monday 9:00AM — 75 ℉
Expect scattered clouds with temperatures ranging between 75 and 75 ℉.
Wind: 24 E mph; Humidity: 31%; 
Clouds Monday 12:00PM — 84 ℉
Expect broken clouds with temperatures ranging between 84 and 84 ℉.
Wind: 29 SSE mph; Humidity: 25%; 
Clouds Monday 3:00PM — 90 ℉
Expect scattered clouds with temperatures ranging between 90 and 90 ℉.
Wind: 28 SSW mph; Humidity: 18%; 
Clouds Monday 6:00PM — 80 ℉
Expect scattered clouds with temperatures ranging between 80 and 80 ℉.
Wind: 46 NE mph; Humidity: 29%; 
Clouds Monday 9:00PM — 70 ℉
Expect scattered clouds with temperatures ranging between 70 and 70 ℉.
Wind: 25 E mph; Humidity: 45%; 
Clouds Tuesday 6:00AM — 61 ℉
Expect broken clouds with temperatures ranging between 61 and 61 ℉.
Wind: 18 NE mph; Humidity: 63%;