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River Flow Resources

Whether you're wading or float fishing from a boat, fly fishing can be done all year long from winter to summer. Before you hit the river, it's not only important to know where to go, but also what the river flows and conditions are in the area. Check Your Flies has curated a list of river flow resources and their features to help guide you with the best decision making on the water. 



The United States Geological Survey

The United States Geological Survey (USGS) is a scientific agency that studies the landscape and natural resources of the United States. USGS provides all sorts of data such as earthquakes, land slides, algae blooms to name a few. But for now we will talk about their river flow data. This is where most of the river data comes from for the resources listed on this page.

  • Flow Update: Real time flows
  • Includes all rivers in the USA
  • Interactive map to search location
  • Historical river flow data
  • Discharge graph of river flow

American Whitewater

American Whitewater Is an organization that advocates for the protection and preservation of whitewater rivers in the United States. Through designating Wild and Scenic rivers as well as removal of dams, American Whitewater is dedicated to preserving rivers for human powered recreation. 

  • Flow Update: Real time flows
  • Includes all rivers with gages in the USA
  • Interactive map to search location
  • Real time photos and beta
  • Collaborative editing: post your own river beta and read others
  • Shows river class and ideal flows for floating
  • Historical river flow data


The RiverApp is available for iPhone and Android. This is a quick and easy to use app that can provide river flow data and maps on the fly. Add your top rivers to your favorites section and have all the information you need at your fingertips.  

  • Historical river flow data
  • Shows water temperatures
  • Maps of over 15 countries
  • Create a favorite list of rivers
  • Collaborative editing: upload your own river beta and read others
  • FREE


We hope you find these river flow guide resources useful, now get on the water and catch some fish!