BirdTrout
Mamaroneck River, New York
11.4 mapped river miles, draining 15 square miles, in the Bronx basin watershed. No gauge stands in it; the nearest is 11.9 miles away, and what this page knows about its temperature is NYSDEC's classification of the water itself.
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 live reading
The nearest gauge is 11.9 miles away, at Bronx River At Ny Botanical Garden At Bronx Ny — not a reading of this water, but of what the region is doing today.
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 6.2–3.4 | 2.9 | cold | — |
NYSDEC has classified 2.9 of the 11.4 miles NHD carries for this stream — 25% 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
- Mamaroneck River fishing report — what it reads right now
- How to get to the Mamaroneck River — access, parking and public land
- Mamaroneck River fishing regulations — season, size and gear by reach
NYSDEC classification
NYSDEC classifies this water as Class A — drinking water source, Class B — swimming and contact recreation, Class C — fishing, and Class SB — swimming and contact recreation, saline. 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 →
Public land on the river
16 units of public or open-access land touch this river, 6,942 acres in total. Acreage is the whole unit, not the part beside the water.
| Unit | Owner | Acres |
|---|---|---|
| County Of Westchester Land | county land | 5,742 |
| Town Of Harrison Land | city land | 246 |
| John A Passidomu Veterans Memorial Park | local holder not recorded | 45 |
| Village Of Mamaroneck Land | city land | 52 |
| City Of White Plains Land | city land | 621 |
| White Plains City Lands | city land | 138 |
| Delfino Park | city land | 19 |
| Village Of Mamaroneck Land | city land | 18 |
| Westchester Joint Water Works Land | regional water district | 2 |
| Columbus Park (Station Park) | city land | 7 |
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
4 named streams meet this one. Confluence miles are above the mouth; the longest twelve are listed.
- Sheldrake River 6.9 mi · RM 1.3
- Beaver Swamp Brook 4.9 mi · RM 0.4
- West Branch Mamaroneck River 2.0 mi · RM 4.1
- Otter Creek 1.1 mi · RM 0.0
Mamaroneck River sits in HUC 8 02030102, the Bronx basin, and drains 15 square miles, Strahler order 3 at the mouth. 33 NHD reaches carry the name for 11.4 miles in total.
Other water nearby
The closest 6 rivers on this site, straight-line from the middle of this one — not drive time.