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Texas | South Texas Plains
San Antonio River
CR 125 River Access Site to Helton Nature Park
Check current paddling conditions for this San Antonio River route, including water level, recent gauge trend, weather, and route details.
Route location
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Need to know
Why this call
Conditions
Gauge history and hourly forecast
The top card is the quick read. This lower section keeps the longer gauge trend, gauge context, and hourly forecast together.
Gauge detail
Gauge history & hourly forecastDetailed view
Gauge
Recent trend
Checking preferred range.
Checking trend.
Gauge source
--Checking timestampMN DNR provides the current paddling level here, but not chart-ready recent samples.
Weather
Hourly forecast
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Next 8 hours
Short-route forecast
Checking the next several hours.
Route overview
Quick facts and what's next
Distance, difficulty, shuttle basics, and the near-term outlook before you commit to the drive.
Quick facts
Plan ahead
Upcoming outlook
These are early planning reads. Re-check live conditions before you commit to the drive.
Waiting on forecast.
Waiting on forecast.
Plan
Plan your trip
Launch points, shuttle details, distance, and access notes.
Route logistics
Access and shuttle
Launch from the CR 125 / Graytown midpoint access and take out at Helton Nature Park for the shorter official SASPAMCO day route. Use USGS 08181800 near Elmendorf with a conservative 200 cfs floor, then make a same-day call on low water, log jams, rainfall, water quality, soft banks, and the firm Helton finish.
Prepare this trip
Take the plan with you
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Put-in
CR 125 River Access Site / Graytown ParkTPWD publishes CR 125 and Helton coordinates for the 6.43-mile SASPAMCO option, and SARA confirms Graytown Park and Helton as public River Authority access points.
Take-out
John William Helton - San Antonio River Nature ParkSARA's current alert keeps the southern SASPAMCO section downstream of Helton temporarily closed because of large log jams. Do not continue past Helton toward CR 117 or Floresville until SARA lifts that closure.
Plan this segment
Access caveats and watch for
Access caveats
- TPWD publishes CR 125 and Helton coordinates for the 6.43-mile SASPAMCO option, and SARA confirms Graytown Park and Helton as public River Authority access points.
- SARA's current alert keeps the southern SASPAMCO section downstream of Helton temporarily closed because of large log jams. Do not continue past Helton toward CR 117 or Floresville until SARA lifts that closure.
- Helton Nature Park has day-use amenities, river access, and campground reservations, but overnight use needs a separate campground booking rather than an informal riverbank plan.
- This route uses conservative corridor-level TRPA flow guidance and the upstream Elmendorf gauge, not a manager-authored exact-segment gauge table. If the gauge is below about 200 cfs, expect a slower, scrape-prone, debris-sensitive trip.
- Coordinates are access anchors from TPWD/SARA context. Follow posted launch paths and current site conditions on arrival rather than projecting mid-channel points.
Watch for
- Flows near or below about 200 cfs, when the current implementation reading was below the conservative floor and low-water snags or shallow lines are more likely.
- Fresh rain, rising water, or readings approaching TRPA's 2,000 cfs maximum cue, when the unrestrained lower San Antonio can produce temporary high flows and poorer water quality.
- Log jams, sweepers, strainers, soft mud banks, variable cell coverage, heat, limited bailouts, and long quiet pools that can stretch the day.
- The required Helton take-out boundary; do not drift into the temporarily closed downstream SASPAMCO section.
- Private banks outside the named public accesses and any direct hazard-portage corridor.
Route gallery
See this route on the water
Photos help show what the access looks like and what the route actually feels like on the water.
Score & sources
Why this score
See the gauge, weather, and source notes behind today's call.
Why this scoreToday's evidence strength is checking
Evidence strength mostly comes down to three things: how direct the active gauge is, how clear the range is, and how fresh the data is.
- Checking evidence-strength notes.
- Checking evidence cautions.
Data behind the scoreGauge, thresholds, and timing
These are the live readings and threshold notes behind today's score.
| Gauge site | San Antonio Rv nr Elmendorf, TX |
| Discharge | Checking |
| Gauge height | Checking |
| 24h trend | Checking |
| 24h change | Checking |
| Current band | Checking |
| Rain last 24h | Checking |
| Rain last 72h | Checking |
| Air temp | Checking |
| Water temp | Checking |
| Wind | Checking |
| Gusts | Checking |
| Rain timing | Checking |
| Ideal range | Needs paddler reports |
| Known low-water floor | 200 cfs |
| High threshold | Not calibrated yet |
| Evidence strength behind the range | Local route guidance |
| Gauge observed | Checking |
| Paddle Today updated | Checking |
| Main source behind this score | Texas Rivers Protection Association San Antonio River guidance |
| Gauge source | Checking |
| Weather source | Checking |
| Rainfall source | Checking |
NotesWhat to know before you go
These notes cover the access details, route quirks, and source caveats most likely to matter once you get there.
- Official route shapeCR 125 to Helton, 6.43 mi
TPWD identifies CR 125 River Access Site to Helton - San Antonio River Nature Center as the shorter 6.43-mile SASPAMCO option, with 2-4 hour float-time guidance.
- Public access chainCR 125 / Graytown Park to Helton Nature Park
SARA says SASPAMCO includes access points at Graytown Park on the San Antonio River and John William Helton Nature Park, with amenities and parking along the rural park chain.
- Direct live gaugeUSGS 08181800 at 152 cfs / 9.56 ft
USGS Water Services returned same-day San Antonio River near Elmendorf discharge and gage height at 2026-08-11 10:30 CDT during this implementation run.
- Threshold posture200 cfs minimum-only; 300 cfs ideal cue; 2,000 cfs maximum caution
TRPA lists San Antonio River flow guidance as rarely below 200 cfs, ideal at 300 cfs, and maximum at 2,000 cfs, with SARA and USGS current-condition references.
- Closure boundaryDownstream of Helton closed; this route ends at Helton
SARA's current alert says the southern SASPAMCO section downstream of Helton Nature Park remains temporarily closed because of large log jams, so Paddle Today does not publish a continuation from this finish.
- CampingEndpoint campground
SARA's Helton Nature Park page lists campgrounds, river and paddle-trail access, and campground reservations with an overnight fee at the take-out.
- Image decisionNo route-gallery image selected
Bounded SARA, TPWD, Commons, National Rivers Project, San Antonio Report, and same-route web review found route-context images but no clearly rights-clean exact CR-125-to-Helton paddling asset selected for local reuse.
Verify it yourselfCheck the source links
Use these links to double-check the gauge, route details, and access notes before you head out.
Paddler reports
Recent notes from paddlers
A few quick notes from people who were on this route recently.
Reports
Paddler reports
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More routes to check next
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Quick answers
San Antonio River paddling FAQ
What water level is good for paddling San Antonio River?
Paddle Today watches San Antonio Rv nr Elmendorf, TX and uses 200 cfs as the conservative low-water floor for this route. The ideal range still needs more paddler reports.
Where does this San Antonio River route start and end?
This route starts at CR 125 River Access Site / Graytown Park and ends at John William Helton - San Antonio River Nature Park, about About 6.43 mi on the water.
Is this San Antonio River route good for beginners?
This is listed as a moderate route. Expect more planning than an easy float, and use the live score, route notes, and source links before committing.
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