Gleann Nimhe – The Poison Glen is the eleventh studio album by Irish folk music group Altan and their tenth studio album of original material, released in late February / early March 2012 on the Compass Records label.

[9] The album features An Ghealóg, a song composed by Martin Tourish who would later join the band replacing Dermot Byrne, temporarily starting from the extensive Fall 2013 (mostly) German tour and permanently since Dermot Byrne's departure from the band in early 2014.

On 22 April 2012, Gleann Nimhe – The Poison Glen received a six-star album review (out of 10) from PopMatters's music critic John L. Murphy, stating: «Shifting somewhat away from its Narada-label leanings of a decade back into New Age-inflected stylings, this Compass Records release offers a more traditional delivery of tunes, reliable in their familiar conjuring of their Northwestern Irish heritage.

At its best, this recalls their standout albums originally released in America on the Green Linnet Records label.»[10] On 16 December 2015, "Beyond Tunes" blog critic Eros Faulk made the tune "Tommy Potts' Slip Jig" one of his three "tracks of the month December 2015" (out of the blog's seven "tracks of the month"), stating: «One of the greatest Donegal groups strikes again with this exceptional track.

Then fiddlers Mairéad Ní Mhaonaigh and Ciaran Tourish do a wonderful fiddle harmony/backup before going back to melody and ending this tune, all the way the wonderful accompanists doing amazing backup.»[11] See tune identifications for this album at irishtune.info.