The sport of swimrun originated in the Swedish Archipelago, however an activity called "Jog and Dip" started in 1941 when Aberdyfi Outward Bound School was set up to train the Merchant Navy during World War II. Aberdyfi also became a training ground for a special troop of Army Commandos between 1942 and 1943.
To this day the Dyfi Estuary plays a big part in building resilience, teamwork and leadership skills in young people, through adventures in the wild with The Outward Bound Trust.
The Dyfi estuary is very special, now you can experience it in all it's glory.
Approaching Picnic Island. Photo by Will Coombe 2021
Swim total: 3km
Run total: 15km
Longest swim: 1.2km
Longest run: 7km
Number of swims: 4
Number of runs: 5
Height gain: 320m
Total distance is 18km with 17% swimming.
HOW IT PLAYS OUT:
Aid stations at 7km and 12km
Expect water temperature to be around 14 degrees Celsius. The course is subject to small changes.
In certain conditions there is a Plan B route.
4 knots is 7.41 km/h. Photo by Mike Alexander, April 2014.
Swimming with Martin, March 2018. Photo by Will Kilgore.
Wetsuit (suitable for swimrun)
Trail running shoes
Provided at registration:
NFC timing wristband
Illustration of Aberdyfi by Nick Coldham
Swim 1 - 650m: Around low water you will swim across the mouth of the Dyfi estuary to Ynyslas and the Dyfi Nature Reserve.
Swim 2 - 750m: You will swim back across the mouth of the Dyfi estuary from Ynyslas to Aberdyfi beach. The flood tide will have started so you will be swimming across a slight incoming tidal flow.
Swim 3 - 1200m: You'll swim from the Jetty past the village to Picnic Island - the flood tide will be assisting you.
Swim 4 - 400m: The final swim is parallel to Aberdyfi beach with the tide once again on your side.
Expect a bit of bounce on the swims.
If you are not quite up to speed with swimrun, or just want an opportunity to practise, learn, try gear, and have some swimrun fun in a supportive environment then check out our swimrun workshop here.
The start of the Dyfi 13km, the longest estuary swim in the UK. Photo by Dan Wyre.