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Big Thompson River

Starting as a mere trickle on the east side of the Continental Divide, inside Rocky Mountain National Park, the Big Thompson flows from Forest Canyon Pass near the top of Trail Ridge Road through Forest Canyon. As small drainages offer additional snowmelt, the Big Thompson picks up volume, turning into one of Colorado’s finest streams.

The Big Thompson becomes fishable at Moraine Park in Rocky Mountain National Park, about six miles downstream of its headwaters. It’s there at Moraine Park, where the river splits into numerous braids and channels, that fisherman encounter the river’s first public access. Trails leading up and down the river from that point will lead you to great flyfishing experiences.

Moraine is a wide-open area, but the Big Thompson’s banks are lined with willows. It’s typical small stream conditions, and the river is filled with, you guessed it, brook, brown, and cutthroat trout in the 6- to 12-inch range. They’ll readily take a variety of general attractor flies.

River description excerpted from Flyfisher's Guide to Colorado by Marty Bartholomew
River description excerpted from Flyfisher’s Guide to Colorado by Marty Bartholomew

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Latest Guide Report

Fishing Report Date: 9-20-2016

The Big T has been fishing really lately as of late.  The cooler day time temperatures and cold night time temperatures have really dropped the water temperatures.  This has many benefits.  First of all, this makes the fish and bugs happy.  Secondly, it makes the fisherman happy, because its not dreadfully hot on the water.  Lastly, the colder water has triggered the fall bwo hatch.  Cloudy weather is key for the bigger hatches, however, there will be sporadic hatches even on sunny days.



BWO eating brown

Here are the Top 5 flies for the Big Thompson for this week:

  1. Hippie Stomper #16
  2. BWO nymps #16-20
  3. MIdge Bombs #18-20
  4. Parachute Adams #18-22
  5. Radiation Baeits #18-22
Report Statistics
5/5Time on Water: 8 hours
Number of Anglers: 1
Hoook Ups:
Fish Landed: 22
Weather Experienced

Temperature: upper 50's
Wind Conditions: Light-Breeze
Precipitation: None
Water Observations

Water Temperature:
Flow Level: 40 CFS
Runoff? Clear

Report Submitted By: Randy Hanner

Big Thompson River Water Flow Graphs

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