Route

Short and hilly or Long and Flat?

The Puddle Buckley is not a route, just a series of checkpoints (summits and lakeshore locations) which we suggest you hike, run and swim between. Think of it as the drunken inspiration of a stranger in the pub. It may be the ingredients of an amazing adventure, but it’s down to you to make sound judgments about how to safely undertake the adventure.

This GPX file was created on mapping software and is merely an overview of the route. It therefore should not be followed step for step, as it may not relate to the best or safest route on the ground

The route is easily split into 4 sections, each finishing at a road, directly after 1 of the 4 swims.


Leg 1


19.8km across land, 0.7km across water, 20.5km total

Leg 1
Leg 1 start and Leg 4 swim
Leg 1, first 3 summits
Leg 1, summits 4 and 5
Leg 1 Swim and leg 2 start
CheckpointLocationDetails OS Grid reference Height (m) Distance (km)Accumulative Distance (km)
Leg 1 StartLlanberis parking shore of Llyn Padarn Near large swordSH 5781 60439400
1st SummitMoel EilioSummit CairnSH 5562 57727264.34.3
2nd SummitFoel Goch90m NNNE of path/fence junctionSH 5709 56356052.16.4
3rd SummitMoel CynghorionOn fence lineSH 5865 56396742.38.7
4th SummitYr WyddfaTrig pointSH 6099 543710853.712.4
5th Summit Cribau TregalanCairnSH 6053 53709310.913.3
Swim 1 StartSW edge of Elephant RockWhere the shore meets the rock faceSH 6435 5210676.519.8
Swim 1 Finish Llyn Gwynant Beach Beach at north end of lake, west of reedsSH 6486 5236670.720.5

Leg 2


10.5km across land, 0.5km across water, 11km total

Leg 2
Leg 2, summits 1 and 2
Leg 2 swim and leg 3 start

For your round to be official you must NOT travel along the A498, A4086 or A5. You can cross them but not travel along them. (This is to increase safety and enjoyment).

Checkpoint Location Details OS Grid reference Height (m) Distance (km)Accumulative Distance (km)
Leg 2 Start Llyn Gwynant Beach Beach at north end of lake, west of reeds SH 64865 52365 67 020.5
1st Summit Carnedd Cribau East of fence SH 67612 53701 591 424.5
2nd Summit Carnedd Moel Siabod Trig point SH 70529 54636 872 3.427.9
Swim 1 Start Where the west edge of the forest meets Llyn Mymbyr Small beach where the fence meets the Lake SH 70529 54636 182 3.131
Swim 1 Finish Where an overgrown wall meets the north edge of Llyn Mymbyr Boulders on east of wall, may need brambles clearing for access. SH 71447 57794 182 0.531.5

Leg 3


16.9km across land, 0.4 across water, 17.3 total

Leg 3
Leg 3 summits, leg 3 swim and leg 4 start

For your round to be official you must NOT travel along the A498, A4086 or A5. You can cross them but not travel along them. (This is to increase safety and enjoyment).

CheckpointLocationDetailsOS Grid referenceHeight (m) Distance (km)Accumulative Distance (km)
Leg 3 Start Where an overgrown wall meets the north edge of Llyn MymbyrBoulders on east of wall, may need brambles clearing for accessSH 7144 5779182031.5
1st SummitPen yr Helgi DuWestern cairnSH 6980 63038338.339.8
2nd SummitCarnedd LlyewelynSummit cairnSH 6836 643910642.141.9
3rd SummitCarnedd DafyddEast cairnSH 6629 63041044344.9
4th SummitPen yr Ole WenSummit cairn east of pathSH 6559 61939781.446.3
Swim 3 StartWhere a wall meets north shore of Llyn OgwenDry stone wall with style over it (not the ruined wall further west)SH 6559 60463012.148.4
Swim 3 FinishHeadland on centre of Llyn Ogwen’s south bankMost prominent point on headlandSH 6591 60293010.448.8

Leg 4


14.1km across land, 0.6km across water, 14.7km total

Leg 4
Leg 4 Summits 1, 2, 3 and 4
Leg 4 summit 5

We strongly recommend that you recce the route over Tryfan and onto Glyder Fach. There is a lot of steep, loose ground and cliffs. Poor route choice could be fatal.

CheckpointLocationDetailsOS Grid referenceHeight (m)Distance (km)Accumulative Distance (km)
Leg 4 StartHeadland on centre of Llyn Ogwen’s south bankMost prominent point on headlandSH 6591 6029301048.8
1st SummitTryfanAdam and Eve bouldersSH 6640 59399171.450.2
2nd SummitGlyder FachHighest rock on main summit boulders SH 6563 58299941.451.6
3rd SummitGlyder FawrSummit cairnSH 6423 579510011.653.2
4th SummitY GarnSummit point by wind shelterSH 6308 59589472.355.5
5th Summit Elidir FawrSummit shelterSH 6119 61309243.659.1
Swim 4 StartPontoon at east end of Llyn PadarnThrough Gorsaf Ddu car park to pontoonSH 5831 6045943.862.9
Swim 4 FinishLlanberis parking, shore of Llyn PadarnNear large swordSH 5781 6043940.663.5

*Distances are estimates and dependant on route choice. Heights are height above sea level and do not indicate total height gain between points.


A successful completion requires you to visit all the checkpoints under your own power with no mechanical or physical aid. Swimming is compulsory between adjacent checkpoints on the water’s edge. A roads may be crossed but not travelled along.  Always put your own safety and that of everyone else above that of completing the round.

There are so many possible adaptations with this route, so if you feel it is too hard or easy we’d love to hear about your alternatives. Here’s a couple we considered:

  • Missing out Llyn Ogwen, Tryfan, and the Glyders and instead swimming the length of Llyn Idwal and going up the Devils Kitchen straight onto Y Garn.
  • Adding in an extra swim the length of Fynnon Llugwy.