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Texas | South Texas Plains
San Antonio RiverRiver Crossing Park to Helton Nature Park
Official upper SASPAMCO day route from SARA's River Crossing Park / Loop 1604 access to John William Helton Nature Park. TPWD publishes the 12.1-mile route and midpoint access, SARA confirms the park-access chain, and the Elmendorf USGS gauge sits at the put-in for a direct same-river condition check.
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Route location
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Route overview
Trip details
Access rules, camping and seasonal notes.
Permits, camping and season
Access and shuttle
Launch at River Crossing Park / Loop 1604 and take out at Helton Nature Park for the upper 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.
Access map
Put-in
River Crossing Park / Loop 1604 River Access SiteTPWD publishes the Loop 1604, CR 125, and Helton coordinates for the 12.1-mile SASPAMCO option, and SARA confirms River Crossing Park and Helton as public River Authority park accesses.
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.
Road shuttle
Stage the Helton Nature Park take-out first, then drive back to River Crossing Park / Loop 1604. CR 125 is the coordinate-backed midpoint access around mile 5.63 if the group wants a shorter day or a bailout.
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River Crossing Park / Loop 1604 River Access Site to John William Helton - San Antonio River Nature Park is about 12.1 mi. Use the planner to compare shorter access pairs.
Additional access notes
- SARA says River Crossing Park is the first SASPAMCO access and is open daily from dawn to dusk; confirm posted hours and gate status before leaving a vehicle.
- 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, not a manager-authored exact-segment gauge table. If the Elmendorf gauge is below about 200 cfs, expect a slower, scrape-prone, debris-sensitive trip.
More route and safety guidance
- The active SARA closure is downstream of Helton Nature Park, so this route must end at Helton and should not be extended toward CR 117 or Floresville until SARA lifts that alert.
- TPWD warns that low water can expose snags and that heavy rain or high water can create dangerous temporary flows and undesirable water quality.
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Conditions
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Station details and river cameras
Station observations
USGS measurements
Measurement notes and coverage
These are observations at the station. Water depth and current can differ along your trip.
River camera · USGS
View at the gauge
San Antonio Rv nr Elmendorf, TX. This view may be outside your paddling reach. Images are periodic and do not establish safe conditions.
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Sources and methodology
Review source dates and published guidance below. We have not inspected this trip in person.
Why this scoreData reliability: checking
This rating reflects whether the gauge measures this part of the river, whether published water-level guidance is available, and how recently the data was updated.
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Data behind the scoreWater levels, published guidance and update times
These readings and published water-level limits help explain today’s score.
| Gauge site | San Antonio Rv nr Elmendorf, TX |
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| Preferred range | Needs paddler reports |
| Known low-water floor | 200 cfs |
| High threshold | Water-level guidance unavailable |
| 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 |
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NotesPublished evidence and verification notes
These notes cover the access details, route quirks, and source caveats most likely to matter once you get there.
- Official route shapeLoop 1604 to Helton, 12.1 mi
TPWD identifies Loop 1604 River Access Site to Helton - San Antonio River Nature Center as a 12.1-mile SASPAMCO option, with CR 125 as the alternate midpoint access.
- Public access chainRiver Crossing Park, CR 125, Helton Nature Park
SARA says SASPAMCO begins at River Crossing Park on the San Antonio River and continues through additional public access points including Helton Nature Park.
- Gauge check during route review · 2026-08-09USGS 08181800 at 151 cfs / 9.55 ft
This reading was saved when we checked the guide. It is not today’s water level. Check the current gauge and local conditions before paddling.
- 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-conditions 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 Helton-to-Floresville continuation.
- 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.
Verify it yourselfCheck the source links
Use these links to double-check the gauge, route details, and access notes before you head out.
Other routes nearby
More on San Antonio River
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