Llano River river
Total streamflow across the Llano River was last observed at 2,811 cfs, and is expected to yield approximately 5,576 acre-ft of water today; about 243% of normal. River levels are high. Average streamflow for this time of year is 1,157 cfs, with recent peaks last observed on 2025-07-14 when daily discharge volume was observed at 87,400 cfs.
Maximum discharge along the river is currently at the Llano Rv At Llano reporting a streamflow rate of 1,810 cfs. However, the streamgauge with the highest stage along the river is the Llano Rv Nr Mason with a gauge stage of 8.23 ft. This river is monitored from 3 different streamgauging stations along the Llano River, the highest being situated at an altitude of 1,641 ft, the Llano Rv Nr Junction.
River streamflow levels
Daily aggregate streamflow across every monitored gauge along the Llano River. Use the range buttons to zoom in on a specific period.
Total streamflow
Sum of all monitored streamgauges · daily
Every streamgauge along the Llano River
All 3 USGS gauges Snoflo tracks for this river, with current flow, stage, recent change, percent of normal, and the gauge's all-time min / max. Click any header to sort. Cells are heatmapped relative to the column min/max -- darker blue = higher.
| Streamgauge▾ | Streamflow (cfs)▾ | Gauge stage (ft)▾ | 24h Δ (%)▾ | % Normal▾ | Min (cfs)▾ | Max (cfs)▾ | Elevation (ft)▾ |
|---|---|---|---|---|---|---|---|
|
Llano Rv Nr Junction
TX
USGS 08150000
|
239 | 1.86 | -28.0 | 313% | 18 | 19,900 | 1,641 |
|
Llano Rv Nr Mason
TX
USGS 08150700
|
762 | 8.23 | -36.5 | 880% | 1 | 30,600 | 1,232 |
|
Llano Rv At Llano
TX
USGS 08151500
|
1,810 | 4.00 | -51.1 | 1156% | 0 | 54,500 | 972 |
Maximum streamflow discharge by year
The single highest aggregate discharge recorded each year. Spotting the multi-year trend reveals droughts vs. wet cycles long before the headline daily flow does.
Annual peak discharge
From the river's full record · one point per water year
Streamflow elevation profile
Each bubble is one gauge along the river, plotted by current streamflow (x-axis) vs elevation (y-axis), sized by gauge stage. Reading top-to-bottom traces the river from headwaters down to its mouth -- you can see flow accumulate as elevation drops.
Elevation vs streamflow
One point per monitored gauge · bubble size = gauge stage
Llano River
The Llano River is a river in central Texas that flows 105 miles from its source in the Edwards Plateau to its confluence with the Colorado River. The river has a rich history dating back to the pre-Columbian era, when it was used by Native Americans for irrigation and fishing. Today, the river is used extensively for recreational activities such as fishing, swimming, and kayaking. There are also several reservoirs and dams along the river, including Lake Buchanan, Inks Lake, and the Llano River Dam, which provide hydroelectric power and water for agricultural purposes. The river's hydrology is influenced by the region's weather patterns, which can lead to periods of drought and flooding. Despite these challenges, the Llano River remains an important resource for the communities that rely on it for both economic and environmental reasons.
Recreation along the Llano River
Fishing access and paddle runs Snoflo tracks within the watershed.
Track the Llano River in the Snoflo app
Set per-gauge push alerts (e.g. "alert me when flow at the Russian R Nr Healdsburg crosses 5,000 cfs"), and Snoflo's iOS app pushes the moment USGS reports the crossing.
About the Llano River
Where does the data for the Llano River come from?
Streamflow and gauge stage data are sourced from the U.S. Geological Survey (USGS) National Water Information System. The aggregate flow shown at the top of the page is computed by Snoflo as the sum of all monitored gauges along the river.
How is "percent of normal" calculated?
Today's aggregate streamflow is compared to the historical average aggregate streamflow on this calendar day across the river's full record. 100% means right on average; values above 100% indicate above-normal flow (wet year); values below indicate below-normal (dry year or drought).
Why are some gauges showing very different flows?
Gauges along a river measure flow at different points: headwater gauges read what's coming off the snowpack or mountain runoff; downstream gauges integrate everything upstream, including tributary inputs. Wide spreads usually mean a tributary is contributing significantly between gauges.
What's the elevation profile chart showing?
Each bubble is one gauge along the river, plotted by streamflow (x-axis) and elevation (y-axis), sized by gauge stage. Reading top-down traces the river from headwaters to mouth -- you can see flow build as elevation drops.
Can I get alerts when a specific gauge crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app on a per-gauge basis. Open any individual streamgauge from the table above and favorite it to set a discharge threshold.