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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: 09-27-2014

Fly of the day was Copper Ribbed RS2 #20 and #22. 7X has definitely been required lately. Some hit on small dries, jujubaetis. Everything small. Fishing has not been hot but fairly steady all day.

We saw plenty of Caddis larvae in the water, but the fish seemed to be focused on Baetis. We managed to find one Stonefly crawling on stick, not year 3.
Dan Brown on Big Thompson

Report Statistics
3/5Time on Water:
Number of Anglers:
Hoook Ups:
Fish Landed:
Weather Experienced

Clear
Temperature: 70's
Wind Conditions: Calm
Precipitation: None
Water Observations

Clear
Water Temperature: 56
Flow Level: 50 CFS
Runoff? Clear
Wallace Westfeldt

Report Submitted By: Wallace Westfeldt


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Big Thompson River Water Flow Graphs