Fishing Conditions: GREAT

Report Rating: GREAT
Crowd Rating: Very Crowded
Very Crowded

Fly Fishing Report Date:

Tuesday, Aug 11, 2020

Weather & Water Conditions

Weather Water
Temp: 60+ Temp: 60+
Sky: Clear Flow: 70
Wind: None Clarity: Crystal Clear
Precip: None Runoff: No 

Colorado Stream Update: Saint Vrain is fishing great!

Current Conditions at Saint Vrain:

The St. Vrain is finally recovered from the flood. We are seeing great fishing in the canyon and in Lyons. Lots of larger than average fish are being caught on a well presented dry fly. Flows are around 70cfs which makes for perfect summer conditions.

The fishing is great.  Clear skies and 60+ degree weather. The water temperature was between 60+ degrees and Crystal Clear.

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
Colorado Trout Fisher logo

BOOK A TRIP

Trip Includes:
  • Flies and fishing tackle
  • Rods/reels
  • Waders
  • Lunch
  • Transportation
$225 for 1 or 2 people
$295 for 3 people
Angling University: Anyone can learn to fish.
The Flyfisher Guide Service: Get out and fish.

Likely Catch

Species: Rainbow
Weight: 1 lbs 0 oz
Length: 15 inches
Girth: 4 inches
Rainbow Trout Female Rainbow Trout Female
Rainbow Trout Male Rainbow Trout Male

Current Insect Hatches at Saint Vrain

Insect Type: Stonefly

Insect: Small Western

Color:

Size:

Time:

Small Western Nymph Illustration
Small Western Adult Illustration

Insect Type: Terrestrial

Insect: Grasshopper

Color:

Size:

Time:

Grasshopper Illustration
Grasshopper Illustration

Recommended Flies for Saint Vrain

Fly: Parachute Adams
Color: 
Size: 
Time: 
Parachute Adams Parachute Adams
Fly: Elk Hair Caddis
Color: 
Size: 
Time: 
Elk Hair Caddis Elk Hair Caddis
Fly: Charlie Boy Hopper
Color: 
Size: 
Time: 
Charlie Boy Hopper Charlie Boy Hopper

Colorado Hatch Conditions for Late September

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: 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: October Caddis
Color: Orange Tan to Grayish Black
Dates: Sep 1 – Oct 30
Emergence: Shallows, Afternoon & Evening
Size: 8-10
Spinner Fall: NA
October Caddis Larva illustration
October Caddis Emerger illustration
October 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: 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: Mahogany Dun
Color: Reddish Brown to Blackish Brown
Dates: Sep 1 – Oct 31
Emergence: Early Afternoon
Size: 16-18
Spinner Fall: Late Evening
Mahogany Dun Nymph illustration
Mahogany Dun Emerger illustration
Mahogany Dun 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 

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: September Stone
Color: Reddish Brown with Orange belly
Dates: Aug 15 – Oct 31
Emergence: Early Afternoon to Evening
Size: 4-10
Spinner Fall: NA
September Stone Nymph illustration
September Stone 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: 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

Clouds
Currently: Overcast Clouds
Temperature:  35 F
Temp Max:  41 F
Temp Min:  17 F
Humidity: 27%
Wind: 39 W mph
Pressure: 1015
Snow Monday 5:00PM — 27 ℉
Expect light snow with temperatures ranging between 11 and 27 ℉.
Wind: 47 WNW mph; Humidity: 75%;  Snow: 0.19 for next 3 hours.
Clouds Monday 8:00PM — 18 ℉
Expect scattered clouds with temperatures ranging between 6 and 18 ℉.
Wind: 27 W mph; Humidity: 82%; 
Clouds Monday 11:00PM — 13 ℉
Expect broken clouds with temperatures ranging between 5 and 13 ℉.
Wind: 27 W mph; Humidity: 82%; 
Clouds Tuesday 2:00AM — 7 ℉
Expect overcast clouds with temperatures ranging between 3 and 7 ℉.
Wind: 24 W mph; Humidity: 83%; 
Clouds Tuesday 5:00AM — 0 ℉
Expect overcast clouds with temperatures ranging between 0 and 0 ℉.
Wind: 20 W mph; Humidity: 86%; 
Clouds Tuesday 8:00AM — 3 ℉
Expect broken clouds with temperatures ranging between 3 and 3 ℉.
Wind: 20 W mph; Humidity: 81%; 
Clouds Tuesday 11:00AM — 9 ℉
Expect overcast clouds with temperatures ranging between 9 and 9 ℉.
Wind: 17 NW mph; Humidity: 73%; 
Snow Tuesday 2:00PM — 13 ℉
Expect light snow with temperatures ranging between 13 and 13 ℉.
Wind: 11 NNE mph; Humidity: 76%;  Snow: 0.38 for next 3 hours.
Snow Tuesday 5:00PM — 9 ℉
Expect light snow with temperatures ranging between 9 and 9 ℉.
Wind: 6 SSE mph; Humidity: 90%;  Snow: 0.5 for next 3 hours.
Clouds Tuesday 8:00PM — -1 ℉
Expect broken clouds with temperatures ranging between -1 and -1 ℉.
Wind: 16 W mph; Humidity: 89%; 
Clouds Tuesday 11:00PM — -1 ℉
Expect scattered clouds with temperatures ranging between -1 and -1 ℉.
Wind: 23 W mph; Humidity: 86%; 
Clouds Wednesday 2:00AM — -1 ℉
Expect scattered clouds with temperatures ranging between -1 and -1 ℉.
Wind: 30 W mph; Humidity: 85%; 
Clouds Wednesday 5:00AM — -0 ℉
Expect scattered clouds with temperatures ranging between -0 and -0 ℉.
Wind: 34 W mph; Humidity: 79%; 
Clouds Wednesday 8:00AM — 5 ℉
Expect few clouds with temperatures ranging between 5 and 5 ℉.
Wind: 38 W mph; Humidity: 68%; 
Clear Wednesday 11:00AM — 17 ℉
Expect clear sky with temperatures ranging between 17 and 17 ℉.
Wind: 35 W mph; Humidity: 65%; 
Clouds Wednesday 2:00PM — 23 ℉
Expect scattered clouds with temperatures ranging between 23 and 23 ℉.
Wind: 33 W mph; Humidity: 62%; 
Clouds Wednesday 5:00PM — 19 ℉
Expect few clouds with temperatures ranging between 19 and 19 ℉.
Wind: 30 W mph; Humidity: 74%; 
Clouds Wednesday 8:00PM — 15 ℉
Expect few clouds with temperatures ranging between 15 and 15 ℉.
Wind: 33 W mph; Humidity: 79%; 
Clouds Wednesday 11:00PM — 15 ℉
Expect few clouds with temperatures ranging between 15 and 15 ℉.
Wind: 39 W mph; Humidity: 78%; 
Clouds Thursday 2:00AM — 16 ℉
Expect scattered clouds with temperatures ranging between 16 and 16 ℉.
Wind: 46 W mph; Humidity: 77%;