saint vrain
Report: CASE 3 Saint VrainFishing Report | Colorado Fly Fishing Reports & Conditions
Colorado Fly Fishing Reports - Courtesy of The Flyfisher Group


Fishing Conditions: GOOD

Report Rating: GOOD

Fly Fishing Report Date:

Friday, Apr 17, 2015

Colorado Stream Update: The St. Vrain is looking good in Lyons and should be an interesting river to fish due to the recent changes from the floods. We are still expecting good fishing and lots of bugs on the water!

Current Conditions at Saint Vrain:

Fly fishing on the famed St. Vrain has been fair to good and our guides are reporting excellent flows and insect hatches. Fishing has been fair to good on the mid-mormnings and early in the evening. Nine foot leaders and 5x-6x tippet.

Guides report that the St. Vrain is on fire! This is some of the best action of the year on The St. Vrain! The fish have not seen any pressure in months and good hatches of midges and blue winged olives keep the fish rising. The midge hatch is on fire on the local creeks! Our professional fly fishing guides recommend fishing a big dry fly you can see such as a Parachute Adams, for best results tie on a Brook’s Sprout Midge a foot behind your Adams. We are catching with a dry dropper combo! Midges seem to be the name of the game, small and red patterns like the Rojo Midge or Zebra Midge have been hooking their fair share of trout.  The fishing is good.  Clear skies and 19- degree weather. The water temperature was between 36-39 degrees and Slightly Off.

Weather & Water Conditions

Weather Water
Temp: 19- Temp: 36-39
Sky: Clear Flow: 152
Wind: None Clarity: Slightly Off
Precip: None Runoff: No 

Likely Catch

Species: Rainbow Rainbow Trout Female
Rainbow Trout Male
Weight: 1 lbs 8 oz
Length: 16 inches
Girth: 5 inches

Current Insect Hatches at Saint Vrain

Insect Type: Midge Black Midge Larva Illustration Black Midge Emerger Illustration Black Midge Adult Illustration
Insect: Black Midge
Color: Black
Size: 22
Time: PM

Recommended Flies for Saint Vrain

Fly: Juju Baetis Juju Baetis
Color: Dark Blue Olive
Size: 20
Time: All Day
Fly: San Juan Worm San Juan Worm
Color: Red
Size: 18
Time: All Day
Fly: Copper John Copper John
Color: Black
Size: 18
Time: All Day

Colorado Hatch Conditions for Late April

Insects Color Dates Emergence Size Spinner Fall Illustrations
© The Flyfisher Group


American Grannom Bright Green to Greenish Brown Mar 1 -
May 15
Early Morning & Afternoon 10-14 NA
American Grannom Larva illustration American Grannom Emerger illustration American Grannom Adult illustration
Little Tan Short Horn Sedge Dark Brown to Yellow Mar 1 -
Aug 30
Sporadic 14-16 NA
Little Tan Short Horn Sedge Larva illustration Little Tan Short Horn Sedge Emerger illustration Little Tan Short Horn Sedge Adult illustration


Blue Winged Olive Light Olive Brown to Brown Olive Mar 1 -
Nov 15
Clouds & warmest part of day 16-18 Evening
Blue Winged Olive Nymph illustration Blue Winged Olive Emerger illustration Blue Winged Olive Adult illustration
Western Black Quill Purplish Black to Grayish Brown Apr 1 -
Jun 30
Mid Morning 14-12 Evening
Western Black Quill Nymph illustration Western Black Quill Emerger illustration Western Black Quill Adult illustration


Black Midge Blackish to Black Apr 1 -
Nov 15
All Day 18-20 2-3 Hours
Black Midge Larva illustration Black Midge Emerger illustration Black Midge Adult illustration
Chocolate Brown Midge Brown to Chocolate Feb 15 -
Dec 15
All Day 20-22 2-3 Hours
Chocolate Brown Midge Larva illustration Chocolate Brown Midge Emerger illustration Chocolate Brown Midge Adult illustration
Micro Black Midge Blackish to Black Mar 1 -
Nov 15
Morning 22-26 2-3 Hours
Micro Black Midge Larva illustration Micro Black Midge Emerger illustration Micro Black Midge Adult illustration
Snow Midge Gray to Charcoal Jan 1 -
Dec 31
Warmest part of day 24-28 2-3 Hours
Snow Midge Larva illustration Snow Midge Emerger illustration Snow Midge Adult illustration


Micro Black Dark Brown to Black Jan 1 -
May 15
38-44° Water Temps Heat of Day 18-22 NA
Micro Black Nymph illustration Micro Black Adult illustration
Skwala Stone Dark Brown to Yellow Olive Mar 1 -
May 15
38-47° Water Temps, Late afternoon and evening. Riffles and bankwater near foliage. 6-12
Skwala Stone Nymph illustration Skwala Stone Adult illustration
Winter Black Black Brown to Reddish Olive, Mottled Brown Apr 1 -
Aug 15
Cold Mountain Streams and Small Ponds 18-22 NA
Winter Black Nymph illustration Winter Black Adult illustration

Weather for Saint Vrain

Current: 41 °F    Overcast     Wind: 6 MPH NE
Current Condtions

Temperature: 41 °F
Humidity: 62%
Wind: 6 mph NE
Pressure: 14.82 psi
Cloud Cover: 100%

Sunday's Forecast
weather forecastPatchy rain nearby
High: 49 °F
Low: 35 °F
Wind: 7 mph E
Monday's Forecast
weather forecastPatchy rain nearby
High: 54 °F
Low: 39 °F
Wind: 4 mph ESE
Tuesday's Forecast
weather forecastSunny
High: 67 °F
Low: 40 °F
Wind: 6 mph NW

Archived Fishing Reports for Saint Vrain