New York | St. Lawrence County / Louisville and Massena
St. Lawrence River
Wilson Hill Wildlife Management Area to Massena NYPA launch
Route planning details, access notes, and local verification guidance.
Route location
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Need to know
Why this call
Conditions
Gauge history and hourly forecast
Use the gauge context and hourly forecast to verify local conditions before launching.
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
Checking weather.
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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
A planning-only approximately 3–5-mile St. Lawrence River open-water paddle from the public Wilson Hill Wildlife Management Area launch near Louisville to the public NYPA launch near Massena. Current St. Lawrence County paddling guidance specifically recommends a 3–5-mile Louisville-to-Massena outing, and NYSDEC lists both public launch facilities. This is broad regulated water rather than a narrow creek: the route requires a suitable craft, conservative wind and weather judgment, separation from commercial and recreational traffic, and a hard finish at the Massena launch.
Prepare this trip
Take the plan with you
Download the canonical route, add a calendar hold, or send a simple float plan to your group.
Put-in
Wilson Hill Wildlife Management Area St. Lawrence River launch, LouisvilleNYSDEC lists both launch facilities as public hard-surface ramps, but launch status, gates, parking, shoreline footing, and water conditions can change seasonally or with agency operations.
Take-out
Massena NYPA St. Lawrence River launchThe source’s 3–5-mile Louisville-to-Massena description is a local planning recommendation, not a surveyed route trace. Wind, islands, channel choice, current, and traffic can change the actual line and duration.
Plan this segment
Pulling access map tiles. Usually under 5 seconds.
Access caveats and watch for
Access caveats
- NYSDEC lists both launch facilities as public hard-surface ramps, but launch status, gates, parking, shoreline footing, and water conditions can change seasonally or with agency operations.
- The source’s 3–5-mile Louisville-to-Massena description is a local planning recommendation, not a surveyed route trace. Wind, islands, channel choice, current, and traffic can change the actual line and duration.
- The St. Lawrence is shared with Canadian waters and contains navigation and power-project infrastructure. This route stays within the New York-side public-launch plan; do not cross into restricted or international-border waters without a separate legal and safety review.
- This route is separate from the Raquette, Grasse, and Oswegatchie cards. Do not use their launch or gauge context as permission to extend this open-water section into tributaries, canals, or restricted facilities.
Watch for
- wind direction and speed, wave build, thunderstorms, visibility, cold water, daylight, and USGS 04264331 coordinated-discharge context
- commercial vessels, recreational wakes, navigation channels, dams, intakes, power-project notices, islands, border signage, and shoreline works
- Wilson Hill and Massena ramp condition, gates, parking, NYPA/DEC restrictions, safe landing, and a conservative early-turnaround option
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
Data and sources
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 | St. Lawrence River at Cornwall, Ontario near Massena, NY |
| 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 | Not calibrated yet |
| High threshold | Not calibrated yet |
| Evidence strength behind the range | Official and local sources |
| Gauge observed | Checking |
| Paddle Today updated | Checking |
| Main source behind this score | No universal numeric paddling cutoff is published for the Louisville-to-Massena open-water paddle; use local wind, waves, vessel traffic, power-project notices, weather, and visual conditions |
| 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.
- Current public endpoint chainWilson Hill Wildlife Management Area launch to Massena NYPA launch
NYSDEC’s current St. Lawrence County directory lists both public hard-surface St. Lawrence River launches, parking capacities, coordinates, and managing agencies.
- Named moving-water sectionLouisville to Massena; approximately 3–5 planning miles
Visit St. Lawrence County specifically recommends the 3–5-mile Louisville-to-Massena paddle and describes the local St. Lawrence as a broad recreational river corridor.
- Route-specific flow and weather guidanceNo universal numeric cutoff; wind, waves, vessels, navigation notices, and local inspection control
The open-water setting and regulated power/navigation system make local wind, wave, traffic, and structure conditions more important than a single discharge number.
- Same-river proxy gaugeUSGS 04264331 St. Lawrence River at Cornwall, Ontario near Massena, NY
USGS describes coordinated discharge near Massena but states there is no gage and the value is derived from power-dam, diversion, municipal, and navigation-canal flows; treat it as broad system context only.
- Safety and navigation postureOpen-water craft, PFD, wind/wave checks, commercial-vessel separation, dam/intake exclusion, and early-turnaround plan
Current St. Lawrence County guidance warns that the corridor carries motorized leisure, fishing, sailing, and thousand-foot cargo vessels; the route preserves a conservative open-water boundary.
- Camping postureNearby lodging or managed campground only; no riverbank camping claim
Robert Moses State Park camping is separate managed-facility context and does not create overnight rights at the route’s public launches or intervening shoreline.
- Approved St. Lawrence River imageVisit St. Lawrence County paddling photograph used as route-context imagery
The source image depicts St. Lawrence County paddling context and is clearly presented as route-context imagery, not a claim about current launch, wind, vessel, or wave conditions.
- Same-river proxy gaugeUSGS 04264331, St. Lawrence River at Cornwall, Ontario near Massena, NY
USGS 04264331 is a same-river coordinated-discharge station at Cornwall near Massena, but USGS states there is no gage and that discharge is determined from power-dam, diversion, municipal, and navigation-canal flows. Treat it as broad regulated-system context, not a local water-level or wave measurement.
- Safety and river conditionsCheck live gauge, recent rainfall, trend, debris, bridges, and access conditions before launch
Visit St. Lawrence County / NYSDEC / USGS / NYPA context and its linked safety material warn that conditions change rapidly and require local inspection.
- Image decisionApproved watershed/proxy-gauge context image used for route presentation
The image is clearly labeled as watershed/proxy-gauge context and does not claim to depict this exact reach.
Verify it yourselfCheck the source links
Use these links to double-check the gauge, route details, and access notes before you head out.
- Visit St. Lawrence County / NYSDEC / USGS / NYPA context route record
- NYSDEC St. Lawrence County launch directory
- USGS St. Lawrence River near Massena coordinated-discharge context
- Visit St. Lawrence County open-water and vessel context
- USGS 04264331 monitoring location
- USGS 04264331 current conditions
- St. Lawrence River context image
Paddler reports
Recent notes from paddlers
A few quick notes from people who were on this route recently.
Reports
Paddler reports
See recent photos and notes from people on the route.
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Quick answers
St. Lawrence River paddling FAQ
What water level is good for paddling St. Lawrence River?
Paddle Today watches St. Lawrence River at Cornwall, Ontario near Massena, NY and uses Not calibrated yet as the conservative low-water floor for this route. The ideal range still needs more paddler reports.
Where does this St. Lawrence River route start and end?
This route starts at Wilson Hill Wildlife Management Area St. Lawrence River launch, Louisville and ends at Massena NYPA St. Lawrence River launch, about Approximately 3–5 planning miles from the Louisville/Wilson Hill launch area to Massena on the water.
Is this St. Lawrence 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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