rivers.run

Rivers.run provides water levels, water temperature, and other information, using data collected from over 12,000 gauges. It matches this information with crowdsourced paddling expertise to tell you what a river height actually means, and to provide skill level estimates.
You can use GPS coordinates to find rivers near you, and search rivers by water levels, skill, name, and rating, as well as user provided tags and dam releases, helping you find whitewater (or flatwater) rivers that you want to paddle.
You can also use rivers.run maps to find rivers in an area, and to assist with navigation. Clicking on any point shows all the information rivers.run has about the river - flow, temperature, and other information. If you're interested in weather, you can also enable the weather view to get a good idea of where rain is currently falling.
River flow levels are currently sourced from USGS (United States Geological Survey), NWS (National Weather Service), and the Meterological Service of Canada. Additional sources for gauges are planned for the future.
Information on rivers.run is crowdsourced - so if your favorite river is not available, is missing information on runnable levels, or has other issues, you can help improve it. Just go to the FAQ page in app to find directions on how to get started. If you need any assistance, you can send an email to [email protected].
NOTE: Rivers.run does work offline, however needs to connect at least once in order to download river information. Attempting to use rivers.run offline before it has downloaded information may result in a launch screen freeze.