See all 3 routes on San Marcos River
Texas | Hill Country
San Marcos RiverCity Park to San Marcos River Retreat
Classic upper San Marcos run from City Park through Rio Vista, Cape's, and Cummings dam-portage decisions to the TPWD RACA access at San Marcos River Retreat. TRPA publishes the six-mile route, numeric San Marcos gauge guidance, and detailed portage cautions.
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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 City Park and finish at San Marcos River Retreat for the upper San Marcos run through Rio Vista, Cape's Dam, Cummings Dam, and Westerfield Crossing. Use USGS 08170500 with TRPA's 60 cfs floor, 150 cfs target, and 500 cfs upper caution, then make a same-day call on portages, crowds, and access permissions.
Access map
Put-in
San Marcos City Park river access areaCity of San Marcos confirms City Park river access for kayaks and canoes, but parking, seasonal crowd controls, and nearby Rio Vista entry rules can change during high-use periods.
Take-out
San Marcos River RetreatSan Marcos River Retreat is private property even though it participates as a TPWD River Access and Conservation Area site. Confirm day-use availability and rules before relying on it as the take-out.
Road shuttle
Stage the San Marcos River Retreat take-out only after confirming day-use access, fee, parking, daylight hours, and no-alcohol rules. City Park is the public upstream put-in; Westerfield Crossing / CR 101 is the practical early take-out or portage point if Cummings Dam, flow, or group skill argues against continuing.
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Access planner
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This changes launch and take-out logistics, not today's river score.
San Marcos City Park river access area to San Marcos River Retreat is about 6.0 mi. Use the planner to compare shorter access pairs.
Additional access notes
- Westerfield Crossing is a route-supported access/portage anchor, but it should not be treated as unrestricted parking or private-bank permission beyond the actual public crossing access.
- The TRPA Google-map coordinates are access anchors, not promises that the exact wetted-edge launch or landing is at the coordinate. Follow signs, ramps, current bank conditions, and staff guidance on arrival.
- Below the city parks, private banks are common. Stop only at public or permission-backed accesses and direct hazard portages.
More route and safety guidance
- Cummings Dam is explicitly described as very dangerous. Stay away from the hydraulic, portage with margin, and do not paddle back toward the waterfall to surf.
- Private-property pressure is real below the city parks. Use City Park, Rio Vista, Westerfield Crossing, and San Marcos River Retreat access only as allowed, and do not stop on private banks except for immediate safety.
Plan this paddle
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No account needed. Check the selected access points above, then choose both dates and times. For an overnight paddle, set take-out to the following date.
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Conditions
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Recent trend
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Gauge source
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Weather
Hourly forecast
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Plan ahead
Tomorrow and the weekend
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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 Marcos Rv at San Marcos, TX. This view may be outside your paddling reach. Images are periodic and do not establish safe conditions.
Photos and recent reports
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Paddler reports
Recent notes from paddlers
A few quick notes from people who were on this route recently.
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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 Marcos Rv at San Marcos, TX |
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| Preferred range | 100 cfs to 150 cfs |
| Low threshold | 60 cfs |
| High threshold | 500 cfs |
| Evidence strength behind the range | Local route guidance |
| Gauge observed | Checking |
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| Main source behind this score | TRPA San Marcos City Park to SMRR flow 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.
- Route shape and thresholdCity Park to SMRR, about 6 mi; 60 / 150 / 500 cfs
TRPA publishes the City Park to Westerfield Crossing / SMRR Scout Camp route with a six-mile distance, 60 cfs minimum, below-100 cfs low cue, 150 cfs ideal, and 500 cfs maximum guidance tied to USGS San Marcos.
- Gauge check during route review · 2026-08-10USGS 08170500 at 97.7 cfs / 3.94 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.
- Public put-inCity Park river access
The City of San Marcos says City Park provides San Marcos River access and allows visitors to bring kayaks, canoes, paddleboards, and tubes with no reservation required.
- Take-out accessSan Marcos River Retreat TPWD RACA day-use access
San Marcos River Retreat describes itself as a private campground and TPWD River Access and Conservation Area site that allows individuals to launch canoes or kayaks from its banks for a day-use fee, subject to site rules.
- Dam and portage safetyRio Vista, Cape's Dam, Cummings Dam, Westerfield Crossing
TRPA's route notes give portage handling at Rio Vista, Cape's Dam, Cummings Dam, and Westerfield Crossing, including a hard warning that Cummings Dam is very dangerous and should not be surfed or treated casually.
- CampingEndpoint campground only by reservation or group/day-use rules
San Marcos River Retreat is a private campground and day-use RACA access site; route camping is not inferred from private banks or city parks, and the normal paddle should be treated as a day route unless separate campground arrangements are made.
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 Marcos River
All 3Nearby routes within 75 miles
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