From just outside Llanberis, the route climbs the A4086 through Llanberis Pass to Pen y Pass at about 1,100 ft, then drops to a junction and follows the old road past a campsite. A 2 km farm track section runs downhill before tarmac returns, with a short sharp climb back to the main road. You continue to Beddgelert and along the A4085 to Waunfawr, climb to about 1,200 ft at Bwlch y Groes, partly unmetalled, and run downhill to finish in Llanberis. Twelve feed stations all carry water, and places are normally allocated by ballot.
Route from Marathon Eryri.
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