Adventure Series 2025 Snowman Sprint Triathlon

Begin with a swim in the fresh waters of Llynnau Mymbyr under the watchful eye of Yr Wyddfa (Snowdon). Exit the water and cross the wooden footbridge for the first time into transition.

The Sprint bike section flows out to Capel Curig before turning towards Llyn Ogwen and Bethesda, a town that grew around the slate quarry industry. After negotiating some quick winding bends down towards Bethesda you’ll turn left and start making your way back up the valley on the road known locally as the Roman road, a road which runs along the steep-sided glacial Nant Ffrancon valley. You’ll tackle a steep climb at the end before re-joining the main road at Llyn Ogwen. From here it’s a nice gentle open road all the way back to Plas y Brenin. This is an exceptionally stunning route, dwarfed in its entirety by two of Eryri (Snowdonia)’s mountain ranges; the Carneddau and the Glyderau.

Running shoes on, head back over the bridge. There is a reason that the Snowman Triathlon regularly gets called the toughest multi-terrain triathlon in the UK because the run includes a mountain, Moel Siabod which at 872 metres, is the highest peak in the Moelwynion mountain range. Sprint athletes don't need to reach the summit but it's still a tough 2.3km climb up beautiful rocky paths before you reach the turning point and run back down again. To finish, you must turn right and run through the forest, then back along the fire road towards the lake. The finish line framing Wales' most famous peak, Yr Wyddfa awaits.