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Saint Regis River, New York

17.5 mapped river miles, draining 86 square miles, in the St Regis basin watershed. No gauge stands in it; the nearest is 35.7 miles away, and what this page knows about its temperature is NYSDEC's classification of the water itself.

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Map key
Public land — where the bank is open to walk and fish
USGS gauge — live water temperature
Water temperature — the colour of the river, and of every dot on it

50°F and colder is cold, through cold-transitional and cool, to warm above 70°F — the same four bands, breaking at 58, 64 and 70°F, that the app paints. Grey is water nobody has measured.

The nearest gauge, and why there is no reading from it

The nearest gauge, 35.7 miles away at W Br Ausable R Trib 2 Ab St Hw 86 Nr Wilmington Ny, is not reporting water temperature: it has sent no water temperature for 1363 days, since 4 January 2023. A stopped gauge repeats its last value in silence, so there is no live temperature here. What is below is modelled from the years that gauge did report: this gauge's own fitted line, its intercept plus its slope against the 4-day mean air temperature over it, fitted on its own daily record, ±2.1 °F. The shape of the week at that gauge, not a thermometer in this stream.

50.4 °F
W Br Ausable R Trib 2 Ab St Hw 86 Nr Wilmington Ny
35.7 mi away · modelled for 28 September 2026, not a reading
Cold

Thermal classification

NYSDEC's classification of this water, reach by reach. A class, not a temperature — no July mean, because none was measured here.

Reach Typed miles Band NYSDEC type
RM 17.5–0.0 32.6 cold —

NYSDEC has classified 32.6 of the 97 miles NHD carries for this stream — 34% of it. Every typed reach carries the same class, cold. The untyped reaches are not warm water — they are water NYSDEC's inventory does not reach, and the mile ranges above span only the reaches it does.

Questions about this river

NYSDEC classification

NYSDEC classifies this water as Class B — swimming and contact recreation, Class C — fishing, and Class D — fishing, natural conditions limit the fishery. More than one class appears because the classification changes along the river. The thermal bar above shows where. On those reaches DEC also designates it trout waters — which is the half of the classification that is about temperature, and the half this map paints by. The class is a designation of best usage under 6 NYCRR — what the water is protected for — and not the season and creel rules, which change yearly and live with the agency.

NYSDEC water quality classifications and standards →

Access

1 mapped NYSDEC access site within a quarter mile of the water, upstream first: Santa Clara Flow/st. Regis River At Santa Clara (RM 1.8). 0 walk-in, 1 boat or canoe launches.

Public land on the river

4 units of public or open-access land touch this river, 85,661 acres in total. Acreage is the whole unit, not the part beside the water.

Unit Owner Acres
Debar Mountain Wild Forest state conservation department 81,285
Unclassified state conservation department 3,940
St. Regis River — Public Fishing Rights Easement NYSDEC 332
East Branch Saint Regis River — Public Fishing Rights Easement NYSDEC 103

Species

NYSDEC designates this as trout water — Trout waters — without naming the species. No fish survey or stocking record for this water is in the files this site reads.

Tributaries and watershed

9 named streams meet this one. Confluence miles are above the mouth; the longest twelve are listed.

Saint Regis River sits in HUC 8 04290006, the St Regis basin, and drains 86 square miles, Strahler order 4 at the mouth. 189 NHD reaches carry the name for 96.8 miles in total — more than the 17.5 miles of drawn mainstem, because NHD counts side channels and braids as their own reaches.

Other water nearby

The closest 6 rivers on this site, straight-line from the middle of this one — not drive time.