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New York | St. Lawrence County / DeGrasse, Pyrites, and Grass River corridor
Grass River
DeGrasse State Forest hand launch through the South Branch/main Grass River corridor to the Pyrites Route 21 kayak/canoe 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.
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
An advanced planning-only approximately 17.5-mile high-water Grass River continuation from the current NYSDEC DeGrasse State Forest hand launch through the South Branch/main Grass River corridor to the public Pyrites Route 21 kayak/canoe launch. NYSDEC describes the South Branch as challenging whitewater used during high water and identifies falls and portage trails throughout the complex; DEC separately confirms the DeGrasse hand launch and river frontage, while a current NYS DPS access document identifies the Pyrites launch as public, ADA accessible, and served by safe roadside loading/unloading. The route ends at Pyrites before the hydropower-dam boundary and does not claim a downstream portage or continuation to Canton.
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
NYSDEC DeGrasse State Forest South Branch Grass River hand launchThe DeGrasse point is the DEC-listed hand-launch coordinate, but the approach includes an unpaved access road and pull-off; confirm the gate, road, parking, carry, waterline, and signs before unloading.
Take-out
Public Pyrites Route 21 Grass River kayak/canoe launchThe Pyrites Route 21 point is a public launch documented by the NYS DPS access inventory, but it is not a guarantee of current parking, dock, landing, or hydropower-boundary conditions. Walk the landing and identify the downstream hard boundary before launch.
Plan this segment
Pulling access map tiles. Usually under 5 seconds.
Access caveats and watch for
Access caveats
- The DeGrasse point is the DEC-listed hand-launch coordinate, but the approach includes an unpaved access road and pull-off; confirm the gate, road, parking, carry, waterline, and signs before unloading.
- The Pyrites Route 21 point is a public launch documented by the NYS DPS access inventory, but it is not a guarantee of current parking, dock, landing, or hydropower-boundary conditions. Walk the landing and identify the downstream hard boundary before launch.
- The route passes from the South Branch into the main Grass River corridor. Public river frontage and navigability do not authorize private-bank landings, unmarked carries, or access through hydropower property.
- The 17.5-mile length and intermediate path are planning estimates. Multiple designated portage trails and informal carries may materially change time, distance, and the viable endpoint; withdraw if a carry cannot be completed legally and safely.
Watch for
- USGS 04265432 downstream proxy, high-water/low-water mismatch, local rain, rapidly changing current, shallow rock, wood, cold water, and daylight margin
- South Branch falls and rapids, Copper Rock/Rainbow/Twin/Sinclair features, strainers, bridge or road hazards, hydropower dam at Pyrites, and remote rescue
- DeGrasse Cole Road access, Pyrites Route 21 landing, seasonal roads, private/easement boundaries, designated camping, posted hydropower restrictions, and the mandatory Pyrites take-out
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 | Grass River at Chase Mills, 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 numeric local threshold published; NYSDEC limits South Branch whitewater use to high-water conditions, while USGS 04265432 is a downstream proxy only—local depth, current, wood, falls, and portage inspection 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.
- Current public upstream accessNYSDEC DeGrasse State Forest hand launch at 44.3681946, -75.07724
NYSDEC identifies the hand launch on the South Branch Grass River and provides the exact water-entry coordinate and access directions.
- Current public downstream accessPublic ADA-accessible Pyrites Route 21 kayak/canoe launch
The current NYS DPS access document identifies the Pyrites launch north of Pyrites on the Grasse River, with Route 21 access and safe roadside loading/unloading.
- High-water and portage guidanceSouth Branch Grass River is challenging whitewater used during high water; DEC lists multiple falls and portage trails
Current NYSDEC guidance supplies the route-specific high-water posture, falls/rapids context, public hand launches, and designated carries.
- Pyrites dam boundaryHydropower dam at Pyrites requires a separate portage/access review
The Grasse River Blueway plan identifies the Pyrites hydropower dam and states that portage is necessary but no formalized portage location exists; this route stops at the public Route 21 launch before claiming that boundary.
- Camping postureDeGrasse primitive campsite and Grass River designated river-access camping context
DEC documents primitive camping at DeGrasse and designated river-access sites in the Grass River Complex; use only current marked legal sites.
- Proxy live gaugeUSGS 04265432 Grass River at Chase Mills
The station has current stage/discharge telemetry but is downstream of this corridor; use only for broad trend context with local inspection and no numeric cutoff.
- Approved same-river context imageUSGS Grass River at Chase Mills station photograph
The public-domain image is clearly labeled as downstream same-river context and does not depict the DeGrasse-to-Pyrites reach, portages, dam, or current conditions.
- Same-river proxy gaugeUSGS 04265432, Grass River at Chase Mills, NY
USGS 04265432 at Chase Mills is a live downstream Grass River proxy with continuous discharge and stage data, but it is materially downstream of the DeGrasse/South Branch corridor. Branch inflow, rainfall, local shallow depth, wood, falls, temperature, and hydropower operations can diverge materially; no numeric threshold is asserted.
- Safety and river conditionsCheck live gauge, recent rainfall, trend, debris, bridges, and access conditions before launch
NYSDEC Grass River Complex / NYSDEC DeGrasse State Forest / Grasse River Blueway / NYS DPS 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.
- NYSDEC Grass River Complex / NYSDEC DeGrasse State Forest / Grasse River Blueway / NYS DPS route record
- NYSDEC Grass River access map and Pyrites Route 21 launch documentation
- USGS 04265432 Grass River at Chase Mills downstream proxy conditions
- NYSDEC Grass River high-water, portage, and outdoor-safety guidance
- USGS 04265432 monitoring location
- USGS 04265432 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
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Quick answers
Grass River paddling FAQ
What water level is good for paddling Grass River?
Paddle Today watches Grass River at Chase Mills, 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 Grass River route start and end?
This route starts at NYSDEC DeGrasse State Forest South Branch Grass River hand launch and ends at Public Pyrites Route 21 Grass River kayak/canoe launch, about Approximately 17.5 planning miles from the DeGrasse hand launch through the South Branch/main Grass River corridor to the Pyrites Route 21 launch 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.
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Access, hazards, wood, and shuttle details change. Send a quick correction if something looks off.