Twelve-year-old Jack Casson raised the money for the Slyne Road hospice by completing the Great North Swim.
Jack, who lives in Bolton-le-Sands, finished in 23 minutes and came 209th out of approximately 550.
The competitive swimmer trained at Lancaster University’s pool every week after school and also at Capernwray Dive Centre to get a feel for open water.
Mum Clare Casson said: “Jack likes a challenge! He hasn’t done any open water swimming before so thought he would give it a go. He picked the hospice as it’s a local charity that does good and needs support. Massive thank you to all that have donated.”