made by naturewithman
Riffle & Redd
Map trout and salmon water, read live USGS river flows, and scout conditions before you go. A free, open field map for the streams you fish.
Pin & organize
Mark access, parking, promising runs, and structure. Group pins into folders for each river.
Live flows
Real-time USGS streamflow, gage height, and water temperature, with a 72-hour hydrograph.
Read the river
USGS topo, high-resolution aerial, LiDAR hillshade, and FEMA flood layers.
Estimate anywhere
Click any river to estimate its flow and a channel cross-section from the nearest gage.
Trends & forecasts
See how today ranks against the record, plus recession and long-term flow trends.
GIS ready
Import and export GeoJSON and Shapefile, and draw or box-select right on the map.
MADE FOR TROUT & SALMON ANGLERS · BUILT BY NATUREWITHMAN
designed to raise awareness for the rivers we love
Trout photo via Unsplash ·