Big Thompson River
CO
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River
About Big Thompson River
The Big Thompson River, also known as "The Big T," is a Colorado freestone river originating in Rocky Mountain National Park and flowing through Estes Park and Loveland. It offers excellent fly fishing for wild-born rainbows, cutthroats, and browns, averaging 10-12 inches. Key hatches include midges, Blue Wing Olives (BWOs), caddis, stoneflies, and Tricos, making it a diverse fishery. Below Forrest Canyon, the river features abundant pocket water and riffles, with public access primarily along Highway 34 from Idlewild Dam to Viestenz-Smith Park, though anglers should be mindful of private property. Moraine Park provides a safer access point for fishing upstream tributaries and meadow areas. The river is best fished with a 4-weight rod and chest-high waders due to its consistently cold water. A 9-mile catch-and-release, artificials-only section exists below Lake Estes to Waltonia Bridge.
Access
Seasons
Terrain
Water
Fish Species
Rainbow Trout
Cutthroat
Brown Trout
Fishing Styles
undefined USGS Water Conditions
Water conditions for the last 7 days. You can gain insights to fishing activity based on these conditions, like water temperature and flow.
Methods
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Wade Only
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Wade Friendly
Land Ownership
National Park
Private No Access
Trip Planning
Best fishing typically occurs during year round. Check water conditions before heading out.
For more insight on the conditions, including hatches and water temperatures, check out the Hatch Forecast.