Welcome to our Montana Stream Flows and Idaho Stream Flows page. Our Montana Stream Flow links are relevant to within the Yellowstone National Park and Greater Yellowstone Area. This includes Montana, Idaho and Wyoming.

Montana Stream Flows and Idaho Stream Flows are one of the most important tools a fly fisher can utilize before going out to your favorite river. Although having the proper equipment is obvious, many times, it is the combination of stream flow and water temperture that determines your success rate.

Click the Stream Flow Menu, on the left, to go to the USGS Stream Flow Data for Montana or Idaho.