Trail Creek At Ketchum Flow Report
As of July 21, 2026, Trail Creek At Ketchum is flowing at 21 cfs with a gage height of 5.09 ft, receding 10% over the past 24 hours. Source: USGS gauge #13137500, refreshed throughout the day.
Historical Data
Trail Creek At Ketchum at a glance
How Trail Creek At Ketchum is running right now, where it sits on the map, and the key gauge stats.
Trail Creek At Ketchum is flowing at 21 cfs, with the water sitting 5.09 ft at the gage. Flow is down 10% since yesterday as the gauge recedes.
This is USGS gauge #13137500 in Idaho. Over the past 10 days the average has been 32 cfs, peaking at 57 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Idaho flow report.
Engineering Data
Flow-duration statistics and observed peak-flow context computed from this gauge’s complete daily record (USGS #13137500).
Estimate flows at an ungauged site
Drainage-area ratio transfer from this gauge . Most reliable for hydrologically similar sites in the same watershed with area ratios between roughly 0.5 and 1.5.
Percentiles are flow-duration values computed from this gauge’s observed daily record as archived by Snoflo. Return periods are Weibull plotting-position estimates from observed annual maxima, provided as general reference context only. Always verify against official USGS NWIS records. Part of Snoflo for Engineering.
Streamflow Forecast
Over the next 5 days, Trail Creek At Ketchum Id is expected to recede from today's 21 cfs, toward roughly 15 cfs by 2026-07-25 (likely range 5-43 cfs) -- drier than normal for the date.
Powered by PULSE — Snoflo’s forecast engine, trained on this gauge’s full record of storms, snowmelt, and dry spells.
| Date | Expected (p50) | Likely range (p25–p75) | vs normal | Projected stage |
|---|
How does this compare to past years?
Year-over-year overlay, annual peak discharge, the full distribution of daily flows on record, and the gauge's rating curve.
Weather Forecast
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day forecast
Daily temperatures, snow, and rain projected over the next two weeks.
Trail Creek At Ketchum
The streamgauge is operated by the USGS and provides data on flow rate and water level. The constituents of the stream are primarily snowmelt and rainfall, with potential tributaries including Warm Springs Creek and the Sawtooth Mountains. Flow rates are highest in the spring and early summer due to snowmelt, and lowest in the fall and winter. Interestingly, the hydrology of the area is impacted by the Sun Valley ski resort, which uses water from Trail Creek to make snow. Overall, Trail Creek at Ketchum is an important gauge for understanding water resources in the Big Wood River watershed.
Nearby streamflow levels
Cross-check Trail Creek At Ketchum's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Trail Creek At Ketchum Id | 21 cfs |
| Warm Springs Cr At Guyer Hot Spr Nr Ketchum Id | 98 cfs |
| Nf Big Wood River Nr Sawtooth Nra Hq Nr Ketchum Id | 54 cfs |
| Big Wood River Nr Ketchum Id | 88 cfs |
| Big Wood River At Hailey Id Total Flow | 242 cfs |
| Big Wood R At S Broadford Bridge Nr Bellevue | 177 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Trail Creek At Ketchum. Spring snowmelt is the dominant driver of streamflow in mountain basins -- a deep snowpack upstream means more runoff later in the season.
| SNOTEL station | Snowpack |
|---|---|
| Ketchum Rs | 0 in |
| Ketchum 2.2 Sse | 0 in |
| Chocolate Gulch | 0 in |
| Nohrsc Hyndman | 0 in |
| Hyndman | 0 in |
| Lost-Wood Divide | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Trail Creek At Ketchum.
Nearby reservoirs
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Boat launches
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River runs
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River levels & flood safety
- Read the level before you go
- A river that's runnable at one flow can be deadly at another. Check current discharge and gage height — like the values shown above — against the flood-stage thresholds, and remember levels can spike fast after rain or a dam release.
- Respect cold water
- Snowmelt rivers run cold even in summer. Sudden immersion triggers cold-water shock and saps strength within minutes. Wear a PFD, dress for the water temperature (not the air), and never wade or paddle alone.
- Watch for swiftwater hazards
- Strainers (downed trees), undercut rocks, and low-head dams are the deadliest features on moving water. High, fast, muddy water hides them. If in doubt, scout from shore and portage.
- Mind flash floods & releases
- Narrow canyons can flood from a storm miles upstream, and dam-controlled reaches can rise without warning. Know the forecast, the release schedule, and your exit before you launch.
Track Trail Creek At Ketchum in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Trail Creek At Ketchum crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Trail Creek At Ketchum
Where does the streamflow data for Trail Creek At Ketchum come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 13137500. Snoflo refreshes the time series throughout the day. Forecasts come from the NOAA / yr.no feed Snoflo's iOS app uses.
How often is the report updated?
USGS gauges report continuously (typically every 15 minutes). Snoflo pulls fresh values throughout the day — look for the "as of" timestamp on the streamflow hero card.
What's the difference between discharge and gage height?
Discharge (cubic feet per second, or cfs) is the volume of water flowing past the gauge each second. Gage height is how high the water sits at the gauge (feet). They're related by a rating curve specific to each gauge — higher water means more flow, but the exact ratio depends on channel shape.
How is "percent of median" calculated?
Today's discharge is compared to the historical median discharge on this calendar day across the gauge's full record. 100% = right on median; 200% = a very high year; 30% = a drought-level low.
What are flood stages, and is this river safe right now?
Flood stages are NWS-defined gage-height thresholds — Action, Minor, Moderate, Major — marking when nearby roads or floodplains start to be affected. "Safe" depends on your activity and skill: a level that's a fun paddle for an expert can be lethal for a wader. Always check the current level against the thresholds above and the safety links, and when in doubt, stay off the water.
Can I get alerts when Trail Creek At Ketchum rises?
Yes — flow alerts are managed in the Snoflo iOS app. Favorite this gauge, set a streamflow threshold (e.g. "alert me when discharge crosses 5,000 cfs"), and you'll get a push the moment USGS reports the crossing.
Access the free Trail Creek At Ketchum report
Create your free account to track this river — and everything else you love on the water.
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