Owenmore River (County Cavan)
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The Owenmore River ( ga, Abhainn Mór, meaning "Big River") rises in the
Cuilcagh Cuilcagh () is a mountain on the border between County Fermanagh (in Northern Ireland) and County Cavan (in the Republic of Ireland). With a height of it is the highest point in both counties. It is also the 170th highest peak on the island of ...
Mountains, in the townland of Dunmakeever, civil parish of Kinawley, Roman Catholic parish of
Glangevlin Glangevlin () is a village in the northwest of County Cavan, Ireland. It is in the townlands of Gub (Glangevlin) and Tullytiernan, at the junction of the R200 and R207 regional roads. It is surrounded by the Cuilcagh Mountains and borders th ...
, Barony of
Tullyhaw Tullyhaw ( ga, Teallach Eathach) (which means 'The Territory of Eochaidh', an ancestor of the McGoverns, who lived ) is a Barony in County Cavan in the Republic of Ireland. The area has been in constant occupation since pre-4000 BC. Locate ...
, County Cavan. It then flows in a north-west direction and ends in the River Shannon in
Gowlat Gowlat, an Anglicisation of the Gaelic, 'Gabhla', meaning ''The Forks'' (of the Rivers), is a townland in the civil parish of Templeport, County Cavan, Ireland. It lies in the Roman Catholic parish of Glangevlin and barony of Tullyhaw. Geograp ...
townlan

It has a fish population of brown trout. The Book of Magauran, dating to the 1350s, mentions an Abhainn Mór (Poem XV, stanza 9) but from the geographical description it probably means the Yellow River at Ballinamore rather than the Owenmore River. What cannot be disputed is the Owenmore River's claim to be the "true" headwaters of the River Shannon with the infant Shannon just a minor tributary of it. The Owenmore flows west for 14.5 km (9.0 mi) through the valley of Glangevlin before joining the Shannon about 3 km (2 mi) below the Shannon Pot at Lugnashinna, thus adding 11 km (7 mi) to the Shannon's overall length, taking it from 360 km (224 mi) to 372 km (231 mi). Shannon River Basin


References

Rivers of County Cavan {{Cavan-geo-stub