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States | Colorado | Big Thompson

Colorado Big Thompson

Characteristics updated about 2 months ago
Flow updated about 8 hours ago
Available Segments 3

River Characteristics

The Big Thompson River is a river in the state of Colorado in the United States. It is located in the Front Range of the Rocky Mountains, and flows through the mountains and canyons of the northern part of the state. The river is named after its discoverer, John Thompson, who explored the area in the 1830s.

The Big Thompson River is a popular destination for all types of fishing and is known for its population of rainbow, brown, and brook trout. The river is also home to other fish species, such as smallmouth bass, kokanee salmon, and greenback cutthroat trout. The best time to fish on the Big Thompson River is typically in the spring and early summer when the water is colder, and the fish are more active.
⋅ Dec 06, 2022
Might be frozen.
· Rocky, Fast Current
Some pockets of deepwater and swift current.
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Current Flow

Big Thompson - Colorado
Gage Station Temp
(ft ³/s)
(ft ³/s)
big thompson bl moraine park nr estes park, co n/a 5.77 13.1
* Mean data is from Friday -- February 03, 2023
** Updated about 8 hours ago
*** streamflow is the volume of water flowing past a given point in the stream in a given period of time.(USGS)


* Based on YTD -- 2023
** Toggle legend names for an uncluttered view


* 3 segments listed for the Big Thompson
Name Fishy Updated
Just Below the Dam · Pretty Darn Fishy over 1 year ago
Rock Canyon Road · Pretty Darn Fishy over 1 year ago
Sleepy Hollow Park · Fishy over 1 year ago


TroutLeader Image

Jul 05, 2021

TroutLeader Image

Aug 07, 2021


Craig Hoffman
over 1 year ago
Fishing buddies. 2 bull elks
Craig Hoffman
over 1 year ago
The river felt relativity empty today. Slightly smoky, but you could still see the blue sky. :)

Known Fish

Known Fish of the Big Thompson
Type Species Up To
Trout Brown 10 in.
Trout Rainbow 10 in.
* Fish likely to be found. Size is a approximation.