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New York | St. Lawrence County / DeGrasse, Pyrites, and Grass River corridor

Grass RiverDeGrasse State Forest hand launch through the South Branch/main Grass River corridor to the Pyrites Route 21 kayak/canoe launch

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.

Route location

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Plan this route

DistanceApproximately 17.5 planning miles from the DeGrasse hand launch through the South Branch/main Grass River corridor to the Pyrites Route 21 launch
DifficultyHard
Typical timeAbout 7–12 hours depending on high-water conditions
ShuttleCar shuttle
Grass River at the USGS Chase Mills station photograph used as downstream same-river context for the DeGrasse-to-Pyrites route.
Route photoGrass River DeGrasse-to-Pyrites paddling contextPhoto by USGS

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Why this call
This route is documented for planning, but does not receive a Paddle Today score.
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Route overview

Trip details

Access rules, camping, seasonal conditions and trip length.

Distance, difficulty, rules and camping
On-water distanceApproximately 17.5 planning miles from the DeGrasse hand launch through the South Branch/main Grass River corridor to the Pyrites Route 21 launchDeGrasse State Forest hand launch through the South Branch/main Grass River corridor to the Pyrites Route 21 kayak/canoe launch
DifficultyhardNYSDEC describes the South Branch as some of the Adirondacks’ most challenging whitewater and limits use to high water. This long mixed branch/main-stem reach adds shallow rock, falls, portages, wood, cold water, hydropower/dam consequences, limited egress, remote rescue, and a mandatory Pyrites boundary.
ShuttleCar shuttleStage the downstream vehicle at the confirmed Pyrites Route 21 launch, then drive to the DeGrasse State Forest hand launch. Allow a large margin for the long shuttle, seasonal roads, scouting, multiple carries, high-water delays, and an early-exit plan; verify both access areas from the ground before launching.
PermitsCheck posted rulesFollow current NYSDEC Grass River Complex and DeGrasse State Forest rules, seasonal road and gate notices, designated-site and at-large camping rules, New York boating/PFD requirements, Clean-Drain-Dry controls, hydropower/dam warnings, private-bank restrictions, and all posted access or hunting notices. Public navigation does not authorize private-bank landing or dam portage.
CampingOptions nearbyDeGrasse State Forest provides a primitive campsite near its unpaved access road, and the broader Grass River Complex has designated river-access sites and additional primitive camping. Use only currently marked legal sites under current DEC rules; no riverbank, private shoreline, hydropower, launch, or unmarked overnighting is claimed for this route.
SeasonApr-OctThis long Adirondack moving-water corridor is most plausible during high water and spring/rain-fed rises. Summer low water, shallow rock, falls, wood, cold water, hydropower operations, seasonal roads, and remote rescue can make the route unrunnable or materially harder. Confirm local conditions, access, portage status, and daylight before launch.

Plan ahead

Tomorrow and the weekend

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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.

Access map

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Start

Put-in

NYSDEC DeGrasse State Forest South Branch Grass River hand launch
Open mapDirections to put-in

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.

Finish

Take-out

Public Pyrites Route 21 Grass River kayak/canoe launch
Open mapDirections to take-out

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.

Road shuttle

Driving shuttle routeShuttle in Apple MapsOpenStreetMap
Access notes and hazards

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

Plan this paddle

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Conditions

Water levels, gauge history, and hourly forecast

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Gauge detail

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Gauge

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Route gallery

Photos

Check each caption: some photos show the surrounding area rather than this exact trip.

Grass River at the USGS Chase Mills station photograph used as downstream same-river context for the DeGrasse-to-Pyrites route.
Grass River DeGrasse-to-Pyrites paddling contextPhoto by USGS
Public-domain downstream same-river context photograph; not the DeGrasse-to-Pyrites reach

Sources

Data and sources

Read the access and hazard notes and check the linked guides. We do not issue a daily score for this trip.

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.

    Source

  • 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.

    Source

  • 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.

    Source

  • 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.

    Source

  • 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.

    Source

  • 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.

    Source

  • 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.

    Source

  • 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.

    Source

  • 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.

    Source

  • 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.

    Source

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Quick answers

Grass River paddling FAQ

What water level is best for the DeGrasse State Forest hand launch through the South Branch/main Grass River corridor to the Pyrites Route 21 kayak/canoe launch route on the Grass River?

This planning route has no live Paddle Today score. Review the linked water-level sources, current access notices and route-specific hazards before travel.

Where does the DeGrasse State Forest hand launch through the South Branch/main Grass River corridor to the Pyrites Route 21 kayak/canoe launch route on the Grass River 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, 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 the DeGrasse State Forest hand launch through the South Branch/main Grass River corridor to the Pyrites Route 21 kayak/canoe launch route on the Grass River suitable for beginners?

This is listed as a hard route. Review the difficulty notes, hazards and current access conditions against your group's skills. No live score assesses this trip.

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