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New York | St. Lawrence County / DeKalb and Canton area
Grass River
Woods Bridge Road to Route 47 below Harrison Creek
Route planning details, access notes, and local verification guidance.
Route location
Loading the route coverage map.
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.
Loading today's forecast.
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 6.6-mile Grass River whitewater reach from the Woods Bridge Road access area to the Route 47 endpoint below Harrison Creek. American Whitewater rates it Class II–V+ and publishes a 400–4,000 cfs planning correlation using the West Branch Oswegatchie gauge. Riverfacts supplies the mapped endpoint anchors; both are access-area points requiring current field verification, and the proxy gauge cannot certify the Grass River’s local runnable line.
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
Woods Bridge Road Grass River access areaRiverfacts supplies the endpoint GPS anchors for the named route, but neither point is treated as a survey-grade ramp. Verify legal parking, carry, waterline, landing, signs, and current permission in the field.
Take-out
Route 47 below Harrison Creek Grass River access areaThe route-source endpoint pair is adjacent to a broader Grass River inventory with multiple sections. Keep the Woods Bridge-to-Route 47 boundary distinct from the separate Downerville/Russell and Pyrites/Canton records.
Plan this segment
Pulling access map tiles. Usually under 5 seconds.
Access caveats and watch for
Access caveats
- Riverfacts supplies the endpoint GPS anchors for the named route, but neither point is treated as a survey-grade ramp. Verify legal parking, carry, waterline, landing, signs, and current permission in the field.
- The route-source endpoint pair is adjacent to a broader Grass River inventory with multiple sections. Keep the Woods Bridge-to-Route 47 boundary distinct from the separate Downerville/Russell and Pyrites/Canton records.
- Do not use visible bridges, shoulders, private camps, fishing pull-offs, or downstream shorelines as alternate access or bailout points without current authorization and a separate safety review.
Watch for
- USGS 04262500 unavailable, rapidly changing, or inconsistent with the local Grass River visual; recent rain, snowmelt, tributary response, and the proxy’s different watershed
- Class II–V+ rapids, ledges, strainers, undercuts, shallow rock, bridge approaches, cold water, limited rescue margins, and feature-to-feature commitment
- Woods Bridge Road parking/carry, Route 47 traffic and landing, private banks, Pyrites/Canton continuation pressure, daylight, and a failed shuttle or extraction plan
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 | West Branch Oswegatchie River near Harrisville, 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 | 400 cfs |
| 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 | American Whitewater reports a 400–4,000 cfs planning correlation at USGS 04262500 for this reach. Because the station is on the West Branch Oswegatchie rather than the Grass River, only the 400 cfs lower planning floor is retained structurally; the upper 4,000 cfs correlation is a cautionary proxy ceiling, not a go/no-go threshold, and local visual level, wood, features, and recovery margin control. |
| 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.
- Named moving-water corridorWoods Bridge Road to Route 47 below Harrison Creek; 6.6 miles; Class II–V+
American Whitewater publishes the distinct reach, length, difficulty range, proxy gauge, and 400–4,000 cfs planning correlation.
- Mapped endpoint anchorsWoods Bridge Road 44.46659, -75.1841 to Route 47 below Harrison Creek 44.5311, -75.1988
Riverfacts maps the named endpoint pair. These are access-area anchors and require current legal landing, carry, parking, and private-boundary verification.
- Proxy gauge and route flow contextUSGS 04262500, West Branch Oswegatchie River near Harrisville; 400–4,000 cfs planning correlation
American Whitewater uses this different-watershed station as the route correlation. Local Grass River observation and feature scouting remain controlling.
- Route-specific safetyFlow-dependent II–V+ whitewater with wood, ledge, bridge, cold-water, and limited-exit controls
American Whitewater supplies the route rating and current condition context; no safety guarantee is inferred.
- Camping postureNearby basecamp or lodging only
No public on-route campsite is established by the route sources; arrange separate legal camping or lodging.
- Approved route imageUSGS Grass River station photograph used as same-river context
The image is clearly labeled as same-river context and does not depict the Woods Bridge or Route 47 access, current, wood, or runnable features.
- Same-river proxy gaugeUSGS 04262500, West Branch Oswegatchie River near Harrisville, NY
USGS 04262500 is the American Whitewater route-source proxy for the Grass reach, with a published 400–4,000 cfs correlation. It is not on the Grass River; use it only as broad regional watershed context with local rainfall, visible level, wood, feature, and rescue checks.
- Safety and river conditionsCheck live gauge, recent rainfall, trend, debris, bridges, and access conditions before launch
American Whitewater / Riverfacts Grass River Woods Bridge Road–Route 47 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.
- American Whitewater / Riverfacts Grass River Woods Bridge Road–Route 47 route record
- Riverfacts Grass River Woods Bridge Road to Route 47 map
- USGS West Branch Oswegatchie River near Harrisville proxy conditions
- American Whitewater Grass River feature and flow guidance
- USGS 04262500 monitoring location
- USGS 04262500 current conditions
- Grass 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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More routes to check next
Compare another stretch on this river, or jump to nearby options before you pick a plan.
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Quick answers
Grass River paddling FAQ
What water level is good for paddling Grass River?
Paddle Today watches West Branch Oswegatchie River near Harrisville, NY and uses 400 cfs as the conservative low-water floor for this route. The ideal range still needs more paddler reports.
Where does this Grass River route start and end?
This route starts at Woods Bridge Road Grass River access area and ends at Route 47 below Harrison Creek Grass River access area, about 6.6 whitewater river miles on the water.
Is this Grass River route good for beginners?
This is listed as a hard route. Treat the live score as a planning aid, then confirm conditions, hazards, access, and group skill before launching.
Flag a change
See something outdated?
Access, hazards, wood, and shuttle details change. Send a quick correction if something looks off.