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| Tidnish River | |
|---|---|
 Tidnish River near arch bridge for the defunct Chignecto Ship Railway. | |
 | |
| Location | |
| Country | Canada |
| Physical characteristics | |
| Mouth | |
• location | Northumberland Strait |
• elevation | sea level |
TheTidnish River is a shortCanadian river on theIsthmus of Chignecto along the interprovincial boundary withNew Brunswick andNova Scotia.
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 tidalestuary at the community ofTidnish Bridge where theChignecto Ship Railway 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 theNorthumberland Strait atJacksons Point onBaie 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.
45°58′59.9″N64°2′56.9″W / 45.983306°N 64.049139°W /45.983306; -64.049139
