Complex sentence: While Belt entrants have to struggle with warm climates, Challenge competitors are subject to the whim of the Irish weather system which even in Summer can be quite grim, though previous walkers have said that the rough weather is all part of the fun.
Split into simpler sentences: While Belt entrants have to struggle with warm climates, Challenge competitors are subject to the whim of the Irish weather system which even in Summer can be quite grim. Though previous walkers have said that the rough weather is all part of the fun.