11-year-old Callum Clarke, a pupil at Tulsk National School, came to the rescue when the boat he and his grandfather Sean Stroker were fishing in capsized shortly after 7 pm.
Callum managed to pull Sean from the water and brought him to the shoreline to safety.
Speaking on RTÉ Radio’s Liveline programme, Seán, who cannot swim and fell into the lake after a freak gust of wind capsized his boat, said he feared the worst and that he didn’t think he was “coming back up”.
An emotional Seán described how Callum had saved his life to Liveline presenter Joe Duffy: “He took me by the collar and pulled me back up and told me to keep my head above the water.
“He proceeded to the bank and waited until I got in until he pulled out of the water himself…unbelievable”.
Callum’s father Kevin and mother Jacqui are understandably proud of their young son.
Kevin, who runs a local minibus and coach hire firm, described Callum as a “hero” to the Roscommon People this week and said he was thankful that the story had a happy ending.
Meanwhile, Jacqui told the radio show: “We’re beyond words, we’re so proud of him. He kept his head and it’s so good that this has a happy ending and we’re able to talk about it”.
As for brave Callum, Roscommon’s newest hero told Joe Duffy that his grandmother had been paying for swimming lessons in the Abbey Hotel in Roscommon town.
“He put his hand on my shoulder. I just kicked my legs until we got to the shore. It was freezing,” he said.
Callum’s grandfather thanked him on air for saving his life. His heroic act was also acknowledged in the Seanad yesterday (Wednesday) when raised by local Senator Eugene Murphy.