Upper Big Thompson
CO
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River
Upper Big Thompson Hatch Chart
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Trip Planning
Check water conditions before heading out for the best fishing experience.
See what insects are emerging on Upper Big Thompson's hatch forecast — including active hatches, water temperatures, and which patterns to have in your box this month.
Get IdentaFly on your phone
Hatch forecasts, river gages, fly scanning, and your journal — built for on-stream use. Be prepared before you get to the water. Free on the App Store and Google Play.
Conditions Report
Read tips and insights about recent conditions for Upper Big Thompson — gathered from on line sources.
Read the Conditions ReportWater conditions (USGS)
Water conditions for the last 7 days. You can gain insights to fishing activity based on these conditions, like water temperature and flow.
Data sourced from USGS National Water Information System
