Big Thompson Fishing Report

Book your trip today!
Book your trip today!

Latest Update: 5/7/2024

Current Streamflow : 104 @ Big T Above Lake Estes,  97cfs  @ Big T Below Lake Estes, 46 cfs @Moraine Park

The water levels on the Big Thompson have been fluctuating a little each day so be sure to check flows before heading out. Blue wing olives have been the main hatch as of lately and the fish have been keyed in on them.

Nymphing early in the day before the water temperature climbs and bugs begin to pop is your best strategy. Once you see bugs begin to move try out a smaller BWO dry fly with an emerger behind it or a smaller hopper dropper rig. A BWO nymph, pheasant tail, or smaller stone is a good option for midday on as well.

Rainbows will start spawning soon in shallow, riffle water so be sure to let them do their thing to ensure fish for the future. Let us know if you have any questions or looking for more info on fishing the Big Thompson!

Recommended Big Thompson Flies:

Dry Flies

  • Adams#18-24
  • Para Winger BWO #18-20
  • Rocky Mountain Mint #16-18
  • Tailing Midge #20
  • Griffith's Gnat #18-22
  • Erics Hi-Vis Midge #20-22
  • CDC Baetis Dun #20-22
  • Mole Fly Olive #20-22
  • Ext. Body Blue Winged Olive #18-22
  • Sprout Midge #20-22


  • Copper John #18-22
  • Flashback Scud Olv. #14-16
  • RS2 #18-22
  • Zebra Midge #20-24
  • Poison Tongue #18-20
  • Mercury Black Beauty #18-22
  • Soft egg Orange #12
  • Splitback Shady BWO#16-18
  • Two Bit Hooker #16-#18
  • Copper Rib RS2 #18-22
  • Flossy Worm #14-18
  • Pheasant Tail #18-22
  • Barr's Emerger BWO #18-20


  • Thin Mint #8-12
  • Beldar Bugger #8
  • Sparkle Minnow #8
  • Hot Head Leech #10
  • Black Wooly Bugger #10
  • Mini Peanut Envy
  • Cousin It Sculpin
  • Baby Swim Coach
  • Mini Peanut Envy #6

The 2023 season on the Big Thompson was an absolute blast!  If you have any questions about guide trips please contact us at 970-498-8968 or click here to book your trip now.