Frio River Flooding, July 2026: Concan Gauge Peaks at 32,500 cfs as Garner State Park Closes

The USGS gauge at Concan, Texas — 08195000, the instrument that tells the whole Frio Canyon whether it's safe to float — peaked at 32,500 cubic feet per second at 9:40 a.m. CDT on July 16, 2026. That's 210 times the river's average flow of 120 cfs (Source: https://water.noaa.gov/gauges/08195000). By 11:15 a.m., three-plus hours later, the river had already dropped to 25,200 cfs, a reminder of how fast a Hill Country flash flood moves through a small limestone watershed.

The Frio does this. It is a spring-fed river with a narrow drainage basin, which means it runs cold and clear most of the year and rises with startling speed when a storm cell parks over the Edwards Plateau. This is a real flood event — Garner State Park is closed, roads near Knippa are underwater, and outfitters are telling paddlers to stay off the water — but it is not the river's worst. That distinction still belongs to 2019, and the gap between this event and that one is the most useful piece of context for anyone trying to gauge how seriously to take this week's numbers.

Current conditions — what the gauge is showing

As of 11:15 a.m. CDT on July 16, 2026, the Frio River at Concan (USGS 08195000) was running 25,200 cfs, down from a peak of 32,500 cfs recorded at 9:40 a.m. the same morning (Source: https://water.noaa.gov/gauges/08195000). Gauge height tracked the same arc — 17.4 feet at peak, down to 15.1 feet by mid-morning. Against an average daily flow of 120 cfs, the peak reading was roughly 210 times normal — a number large enough to close a state park and flood roads, but one that needs a benchmark to be understood correctly.

That benchmark is 2019. The largest flood on record on the Frio hit 240,000 cfs that year. The current peak of 32,500 cfs is about 13 percent of that record — a serious, disruptive flood, but not remotely close to the scale of the river's worst known event. Anyone comparing notes with the 2019 flood, or hearing about this event secondhand, should hold onto that ratio: this is a real flood, not a repeat of the largest one on record.

Garner State Park, the recreational heart of the Frio Canyon between Leakey and Concan, is closed (Source: https://tpwd.texas.gov/state-parks/garner/alert). Garner is the busiest developed access point on this stretch of river — cabins, campgrounds, the dance pavilion, and the swimming and tubing beaches that draw the bulk of summer visitors to the canyon. A closure here isn't a minor inconvenience; it takes the primary public access to the river's most popular reach off the table entirely while flows remain elevated, at what is normally peak season for the park.

Downstream, the picture is more alarming in raw numbers if less familiar to most visitors. The Dry Frio gauge at FM 2690 near Knippa — a stream that is normally dry — read 16 feet. Major flooding has been reported at Knippa and at US 90, where the Dry Frio joins the main Frio (Source: https://www.ksat.com/news/local/2025/07/15/residents-on-alert-after-frio-river-flooding-causes-disruptions-in-concan-knippa). A channel that carries no water in a typical July running 16 feet deep is the clearest single number in this event — it shows how much rain fell over ground that normally sheds almost nothing into the Frio system, and it explains why the flooding downstream at Knippa and US 90 is being treated as a major event in its own right, separate from the Concan reading.

The river itself

The Frio River runs about 200 miles through Real and Uvalde counties in the Texas Hill Country, gauged at Concan by USGS station 08195000. Its name is Spanish for "cold" — a literal description of spring-fed water that stays noticeably cooler than the Texas air around it, not a place name chosen for effect. The river was first recorded in writing in 1689, when the Spanish explorer Alonso De León crossed it and called it the Rio Sarco.

The Frio is born where three smaller branches — the East Frio, West Frio, and Dry Frio — converge near 29°44'N, 99°45'W. From that confluence it runs southeast for roughly 200 miles, cutting through limestone canyons and broad valleys before reaching its mouth at the Nueces River. That limestone geology is what makes the river both scenic and volatile: karst terrain sheds rainfall quickly rather than absorbing it, which is part of why a normally dry channel like the Dry Frio can read 16 feet within hours of a heavy storm.

The canyon's recreational corridor breaks into three familiar segments for anyone who paddles or floats it regularly: Leakey down to Garner State Park (roughly 15 miles), Garner State Park down to Concan (roughly 10 miles), and Concan down to Uvalde (roughly 30 miles). It's the middle and upper stretches of that corridor — Leakey through Garner to Concan — that carry the bulk of summer recreation, and that's exactly where this week's closures and gauge readings are concentrated.

Before European contact, the canyon was contested ground between the Lipan Apache and Comanche, who knew it as Cold Water Canyon. Spanish missionaries established short-lived outposts along the river in the 18th century, part of the broader Spanish colonial push through the region that also produced De León's 1689 crossing.

History — a working river

The Frio's modern history follows a familiar Hill Country arc. Logging worked the watershed from the 1830s through the 1920s, and the U.S. Geological Survey ran formal surveys of the river in the 1870s through 1890s. In 1849, the Adelsverein — the German Emigration Company — established a settlement in Frio Canyon, part of the broader wave of German immigration into the Texas Hill Country in that era that also produced towns like Fredericksburg and New Braunfels farther east.

The Civilian Conservation Corps built Garner State Park during the Depression, and it opened in 1941. The park quickly became known for its summer dances, and it has remained the social and recreational anchor of the Frio Canyon since — which is exactly why its closure this week matters as much as the raw gauge numbers. A closed Garner State Park in mid-July isn't a footnote; it's the cancellation of the thing most visitors come to the canyon to do.

The river's defining flood event came in 2019, when it hit 240,000 cfs — the largest flow on record for the Frio. That flood is the yardstick against which every subsequent high-water event on this river gets measured, including this one. The fact that the Frio has a documented record that large is itself a piece of the river's character: this is a watershed capable of producing genuinely catastrophic floods, not just the kind of routine summer rise that clears out a sandbar.

What's open and what's not

As of July 16, 2026, Garner State Park is closed (Source: https://tpwd.texas.gov/state-parks/garner/alert). The Highway 127 bridge at Concan was closed for part of the day on July 14, then reopened around 4:30 p.m. that same afternoon (Source: https://www.ksat.com/news/local/2025/07/15/residents-on-alert-after-frio-river-flooding-causes-disruptions-in-concan-knippa) — a sign of how quickly conditions on this river can flip from impassable to passable and back within the same day.

Uvalde County has reported roads with water over them near the Frio, and Visit Uvalde County posted a river update on July 15 at 9:00 a.m. noting the river had risen and some roads had standing water (Source: https://www.facebook.com/VisitUvaldeCountyTX/posts/frio-river-update-july-15-900-amthe-frio-river-has-risen-and-some-roads-have-wat/1456104329885066). Downstream, the confluence of the Dry Frio and the main Frio near Knippa and US 90 has seen major flooding (Source: https://www.ksat.com/news/local/2025/07/15/residents-on-alert-after-frio-river-flooding-causes-disruptions-in-concan-knippa).

Floating Texas describes current conditions on the Frio at Concan as high and faster than casual floating conditions, advising that experienced paddlers should use caution and that tubing is not the right call right now (Source: https://www.floatingtexas.com/rivers/frio). That's a useful line for trip planning: this is not a river to bring a tube, a cooler raft, or a first-time paddler to at 25,200 cfs, even as it recedes from its morning peak. Anyone with a Frio Canyon trip planned in the next few days should check the gauge again before leaving, rather than relying on today's numbers.

What it means going forward

The Frio is a flash-flood river by nature. It's spring-fed, which gives it the clarity and cool temperature that make it a Hill Country favorite most of the year, but its watershed is small enough that a heavy rain event translates into a fast, sharp spike rather than a slow rise. The same geometry that makes the Frio flood quickly also makes it recede quickly — the drop from 32,500 cfs to 25,200 cfs in under two hours on the morning of July 16 is typical of how this river behaves once the rain stops.

That's worth holding next to the 2019 record. A 240,000 cfs flood is a different order of event — genuinely catastrophic, and still the benchmark against which this week's water is measured. At 13 percent of that peak, the current flood is significant and disruptive — a state park closed, roads underwater, a normally dry tributary running 16 feet deep — but it is not in the same category, and it should be read as such.

The way to track this going forward is the same instrument that's producing all of the numbers above: USGS gauge 08195000 at Concan. RiverScout pulls that gauge in real time. As a rule of thumb for the Frio Canyon: when the gauge is elevated, the canyon is closed for casual use, whatever the calendar or the park's normal hours say. When it falls, it tends to fall fast, and this river is typically back to floatable conditions within days of a flood event like this one, not weeks.

Spring-fed rivers recover. This flood will pass. Check the gauge before you go.

— Vegeta, RiverScout Editorial