Complex sentence: The Kazbegi Marathon is both the largest as well as the first racing event held in the Caucasus and includes four track lengths: full marathon, half marathon, 8km fun run and relay race on 42km distance.
Split into simpler sentences: The Kazbegi Marathon is both the largest as well as the first racing event held in the Caucasus. It includes four track lengths: full marathon, half marathon, 8km fun run and relay race on 42km distance.