The Tidnish River is a short

Canadian Canadians (french: Canadiens) are people identified with the country of Canada. This connection may be residential, legal, historical or cultural. For most Canadians, many (or all) of these connections exist and are collectively the source of ...

river on the

Isthmus of Chignecto The Isthmus of Chignecto is an isthmus bordering the Maritime provinces of New Brunswick and Nova Scotia that connects the Nova Scotia peninsula with North America. The isthmus separates the waters of Chignecto Bay, a sub-basin of the Bay of Fun ...

along the interprovincial boundary with

New Brunswick New Brunswick (french: Nouveau-Brunswick, , locally ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. It is the only province with both English and ...

and

Nova Scotia Nova Scotia ( ; ; ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. Nova Scotia is Latin for "New Scotland". Most of the population are native Eng ...

. Rising in the northwest corner of Cumberland County, east of the interprovincial boundary, the river's largest tributaries are the West Branch Tidnish River, Little West Branch Tidneish River, Paradise Brook and Chapman's Brook. The river becomes a tidal

estuary An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environment ...

at the community of

Tidnish Bridge Tidnish Bridge is a community in the Canadian province of Nova Scotia, located in Cumberland County on the interprovincial border with New Brunswick between Upper Tidnish, and Lower Tidnish on the Tidnish River. Tidnish Bridge is home to the Chi ...

where the

Chignecto Ship Railway The Chignecto Ship Railway is a historic Canadian portage railway located in Cumberland County, Nova Scotia. With Canadian Confederation in 1867, a variety of canal-building projects were undertaken throughout the new country by the new federal gov ...

constructed a large stone masonry bridge across it. At Tidnish Bridge, the river flows the final 2 kilometres in a serpentine manner to discharge into the

Northumberland Strait The Northumberland Strait (French: ''détroit de Northumberland'') is a strait in the southern part of the Gulf of Saint Lawrence in eastern Canada. The strait is formed by Prince Edward Island and the gulf's eastern, southern, and western sho ...

at Jacksons Point on Baie Verte. This section of the river downstream from Tidnish Bridge also forms part of the interprovincial boundary with New Brunswick. The river provides safe harbour in this downstream area. The river is carefully navigable in its upper reaches past the Chignetco bridge during high tides. The mouth of the river supports a smelt fishery, although this activity has been in slow decline. Typically, fishermen use large bag nets of about 28 feet in width. These are set from rafts or, in winter, from holes cut in the ice and allowed to "strain" the tide to catch smelt. No lobster boats run out of the Tidnish River, but on occasion, herring and mackerel boats may be seen.

See also