Complex sentence: The Huron Mountain Club was not in favor of the highway either as the highway would open vast reaches of the back country, leading to the Club's fear that it would destroy the wilderness aspects of the Huron Mountains.
Split into simpler sentences: The Huron Mountain Club was not in favor of the highway either. The highway would open vast reaches of the back country, leading to the Club's fear that it would destroy the wilderness aspects of the Huron Mountains.