The race takes place in some of north Wales's most spectacular scenery while encircling Snowdon. Runners are advised to consider the cold they may experience during the race and carry body cover with them.
The route follows the A4086 and climbs to the top of the Llanberis Pass (Pen y Pass 1.100ft). Dropping down to the Pen Y Cwyryd junction, the race then follows the old road along to the campsite until it joins the A498. This 2km section is farm track, downhill, then the surface returns to the tarmac. There is a short, sharp uphill back up to the main road at the campsite. The route then continues to the Beddgelert (200ft) and then continues along the A4085 to Waunfawr. From here it is a rapid climb to about 1,200ft at Bwlch y Groes (a short length is unmetalled) and then downhill to the finish in Llanberis.
Marathon is notoriously difficult to overcome. Not only is the route a challenging one (taking runners over some uneven ground including a hill-bound A4068 and fairly sudden ascent to Bwlch y Groes) but in spite of the beautiful scenery that may help you take your mind off the fatigue towards the end of the race, the weather can be significantly colder than many less-experienced marathon runners are used to.
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