• The 3850 is suited for experienced swimmers comfortable with swimming long distance;
  • It is the same swim distance as for an IM swim;
  • The 3850 starts at a Boat Slip on the Monasterevin Road, and finishes at the ramp/jetty close to the Courthouse at Athy;
  • In all, swimmers will have four u-turns to make on this course;
  • To start, swimmers face downstream and swim with the current for the first 770m to the first turn;
  • After the first turn at 770m, swimmers then face a 990m upstream section before the second turn;
  • After the second turn at 1,760m, swimmers turn downstream for 615m before rounding the third turn;
  • After the third turn at 2,375m, swimmers turn upstream for 615m before rounding the fourth and final turn;
  • After the fourth turn at 2,990m swimmers complete the swim with a final 860m downstream swim.
  • Swimmers go by White Castle, and thread one of the eyes of Crom-a-boo bridge before finishing at the jetty.
  • Please note that wetsuits are mandatory for this swim.

Did you know?

  • The River Barrow is Ireland's second longest River and only becomes navigable for boats from Athy onwards.
  • At Athy, it is generally shallow during May with water temperatures in the region of 13 degrees.


We regret to announce that the SwimAthy event planned for Sunday 23 August 2020 will be postponed arising from the COIVD-19 measures currently in place for County Kildare.

We know this will come as a disappointment to many of you, but this decision is in the best interest of all swimmers, stakeholders and the local community at Athy.

We will be in touch with all SwimAthy participants in the coming days with more details surrounding this postponement. Please bear with us while we work out the details.

Yours in sport,

The SwimAthy Team