'The Shannon Pot' : Lake or Island

TownlandLegnashinna
CountyCavan
Grid RefH 053 317
GPSH 05331 31749 (8m)
Longitude7° 55' 5.65" W
Latitude54° 14' 4.25" N
ITM east480366
ITM north584435
Nearest TownSwanlinbar (14.7 Km)
OS Sheet26
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 26th June 2005

If you're passing by this place stop off and take a look. This is the humble source of the mighty River Shannon. The longest river in the British Isles. Through its tributaries it drains over one third of the Island.

The 'Pot' is a 20m diameter sink or swallet hole that feeds a small stream. It's very hard to believe that this 1.5m wide trickle becomes the Shannon!

Apart from its 'wow' factor why put it on this website? Well, it has quite a plce in Irish folklorean d has been recognised as the source of the Shannon for a very long time. "Legend has it that Sinnann, the daughter of Lodan, came to the Shannon Pot in search of the Salmon of Wisdom. The great salmon was angered at the sight of Sinnann and caused the pool to overflow and drown the fleeing maiden. Thus was the Shannon created and which still bears her name", says the information sign.

While I was sitting on the edge of the Pot I saw a fish rise to take a fly. Was it the Salmon of Wisdom? I'd like to think so.

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About Coordinates Displayed

This is an explanation of (and a bit of a disclaimer for) the coordinates I provide.

Where a GPS figure is given this is the master for all other coordinates. According to my Garmin these are quite accurate.

Where there is no GPS figure the 6 figure grid reference is master for the others. This may not be very accurate as it could have come from the OS maps and could have been read by eye. Consequently, all other cordinates are going to have inaccuracies.

The calculation of Longitude and Latitude uses an algorithm that is not 100% accurate. The long/lat figures are used as a basis for calculating the UTM & ITM coordinates. Consequently, UTM & ITM coordinates are slightly out.

UTM is a global coordinate system - Universal Transverse Mercator - that is at the core of the GPS system.

ITM is the new coordinate system - Irish Transverse Mercator - that is more accurate and more GPS friendly than the Irish Grid Reference system. This will be used on the next generation of Irish OS maps.

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