Complex sentence: A path leads over the arête joining Snowdon via the sister peak Garnedd Ugain in the west, but is very exposed and climbing it should not be attempted in high wind or by the inexperienced.
Split into simpler sentences: A path leads over the arête joining Snowdon via the sister peak Garnedd Ugain in the west. This arête is very exposed and climbing it should not be attempted in high wind or by the inexperienced.