RiverTrax: River Levels & Flow
Water Conditions & Forecast
Only for iPhone
Free
iPhone
Now with thousands more creek and tributary gauges (USGS current conditions only) and NOAA estimates and forecasts for rivers and streams that don't have physical gauges.
Rivers and streams can change by the hour. RiverTrax tells you what yours is doing right now — and what it's about to do.
EVERY RIVER, NOT JUST THE FAMOUS ONES
About 12,700 U.S. gauges get an official National Weather Service forecast. Another 4,300 report live data without one. Most moving water has no sensor at all. RiverTrax covers all three — and always tells you which one you're looking at.
Gauged and forecast. Live level, discharge, flood stage and trend, plotted alongside the official NWS forecast.
Gauged, live only. Thousands of smaller creeks and tributaries sit outside the forecast inventory. You get live readings, history, trend, water temperature where it's reported, and alerts — no forecast line or flood stage, because there isn't one.
No gauge at all. The creek behind your house, the section below the dam, the gorge run. An estimate modeled by NOAA, updated hourly.
Just like you don't need a weather station in your backyard to get a forecast, the same is true for rivers.
RIVER STRETCHES
Tap any river or creek on the map. Name it your way: "Below the dam," "The gorge section." See its estimated flow right now, which way it's trending, and a 10-day outlook. Save it next to your favorite gauges and watch it the same way.
Stretch conditions come from NOAA's National Water Model, the federal system that simulates flow on every river and creek in the country. Estimates are always labeled Estimated, attributed to NOAA, and marked with ≈.
WE TELL YOU WHEN WE'RE LESS SURE
A big river running steadily gets a number. A small creek, or water a storm is pushing around, gets a range — what the model can honestly support there. And when the model's output can't be trusted, RiverTrax says "estimate unavailable" instead of showing you a confident wrong number.
FOR ANGLERS
When steelhead push in on a fall rain, the question is always the same: has it dropped back into shape yet? Watch discharge, water temperature and trend on your tributaries, set your fishable range, and let Sweet Spot Alerts tell you the day it comes back down, instead of driving out to look.
FOR KAYAKERS & RAFTERS
See current discharge and whether it's rising or falling. Set your ideal flow range and let Sweet Spot Alerts tell you when conditions are lining up, before you drive to the put-in. Set a good range on a stretch and see it shaded right on the 10-day chart.
FEATURES
Find Your Water
Search any gauge or creek by name or USGS site number. Save it and it pins on your map — every favorite, always, wherever the map is pointed.
Charts You Can Actually Read
Observed discharge plotted alongside official NWS forecasts on a clean timeline. Flood stage thresholds — Major, Moderate, Minor, Action — are marked right on the chart. Tap once for the 10-day outlook.
Alerts That Look Ahead
Set your ideal flow or gauge height range and RiverTrax watches the forecast, telling you when your window is coming days ahead — not the morning of. Set hard thresholds for flood stage, CFS, gauge height, or rate of rise, and it watches those too.
Your Rivers on Your Home Screen
Pin favorite gauges to your iPhone home screen. Live discharge, gauge height, and trend at a glance — no app open required.
Follow the River
Jump straight to the next gauge upstream or downstream, and see every stretch in between.
River Journal — Only on RiverTrax
Write a note on any gauge or stretch and RiverTrax stamps it with the conditions at that moment — discharge, gauge height, rate of change. Build a record of what flows fished or paddled well.
How This Works
A plain-language explainer built in: where every number comes from, what a gauge measures, how a stretch is estimated, and how far to trust each.
NO ADS. NO ACCOUNT. NO SETUP.
Open it, find your water, go.
River data provided by USGS and NOAA. Estimates and extended outlooks are model output, not official forecasts. Not intended for navigation or safety-of-life decisions. Always consult official sources and use good judgment.
Thousands more gauges are now in RiverTrax.
Some USGS stations aren't in the National Weather Service forecast inventory — plenty of smaller creeks and tributaries fall into that gap. Those gauges now work in RiverTrax as observation-only stations: live readings and history, just without a forecast line on the chart.
Alerts work on them too. Set your threshold and RiverTrax will let you know when a creek comes up or drops into range, same as any other gauge.
— John
The developer, TraxLabs LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- TraxLabs LLC
- Size
- 202.6 MB
- Category
- Weather
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later.
- iPhone
- Age Rating
4+
- 4+
- Copyright
- © 2026 TraxLabs LLC
