Fishing Conditions: FAIR

Report Rating: FAIR
Crowd Rating: Not Crowded
Not Crowded

Fly Fishing Report Date:

Thursday, Mar 21, 2019

Weather & Water Conditions

Weather Water
Temp: 40-43 Temp: 32-35
Sky: Clear Flow: 28
Wind: None Clarity: Slightly Off
Precip: None Runoff: No 

Colorado Stream Update: More water, less ice

Current Conditions at Saint Vrain:

The St. Vrain is fishing decent. Nymphing deeper holding water continues to be the best way to find a strike. It feels like spring in the air and the river is starting to respond, but the St. Vrain is still waking up from winter. For best result focus on the warmest part of the day. The lower strectches are ice free for the most part. Make sure you are on the bottom when nymphing.

Spring is here and it’s time to grab the rod and head for the mountains and foothills! March is a great time of year for fly fishing! Take advantage of the sunny days most rivers are ice free and the trout bite is on! Fishing is good but it’s still cold out there! To maximize the bite strive to be on the water from 10 am to 2 pm.  The fishing is fair.  Clear skies and 40-43 degree weather. The water temperature was between 32-35 degrees and Slightly Off.

Likely Catch

Species: Brown
Weight: 1 lbs 0 oz
Length: 13 inches
Girth: 6 inches
Brown Trout Female Brown Trout Female
Brown Trout Male Brown Trout Male

Current Insect Hatches at Saint Vrain

Insect Type: Midge

Insect: Black Midge

Color: Blackish

Size: 22

Time: PM

Recommended Flies for Saint Vrain

Fly: Rs2 Emerger
Color: Black
Size: 20
Time: All Day
Rs2 Emerger Rs2 Emerger
Fly: Pheasant Tail
Color: Brown
Size: 18
Time: All Day
Pheasant Tail Pheasant Tail
Fly: San Juan Worm
Color: Pink
Size: 16
Time: All Day
San Juan Worm San Juan Worm

Colorado Hatch Conditions for Late March

Caddisflies

Insects: American Grannom
Color: Bright Green to Greenish Brown
Dates: Mar 1 – May 15
Emergence: Early Morning & Afternoon
Size: 10-14
Spinner Fall: NA
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
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
Illustrations © The Flyfisher Group 

Midges

Insects: Chocolate Brown Midge
Color: Brown to Chocolate
Dates: Feb 15 – Dec 15
Emergence: All Day
Size: 20-22
Spinner Fall: 2-3 Hours
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
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
Illustrations © The Flyfisher Group 

Stoneflies

Insects: Micro Black
Color: Dark Brown to Black
Dates: Jan 1 – May 15
Emergence: 38-44° Water Temps Heat of Day
Size: 18-22
Spinner Fall: NA
Illustrations © The Flyfisher Group 
Insects: Skwala Stone
Color: Dark Brown to Yellow Olive
Dates: Mar 1 – May 15
Emergence: 38-47° Water Temps, Late afternoon and evening. Riffles and bankwater near foliage.
Size: 6-12
Spinner Fall:
Illustrations © The Flyfisher Group 


Temporarily Unavailable Temporarily Unavailable