This research explores development conflicts within Kopaonik National Park (NP) arising from the prioritization of winter tourism, particularly skiing activities and the associated infrastructure. This emphasis has led to the marginalization of the unique natural heritage that warranted the park’s establishment in 1981, presenting an unusual case of exploiting and jeopardizing significant Balkan natural heritage. Tourist facilities situated in protection zones II and III interface with natural reserves in protection zone I, escalating conflicts and spatial impacts and raising concerns about the preservation of reserves and the park’s original purpose. Kopaonik Mountain, inherently suited for winter tourism, faces the challenge of accommodating a ski center within its exceptional natural heritage. Legal and planning activities support winter tourism without adequately defining its compatibility with the park’s natural heritage. Through an in-depth analysis of legal documents, plans, projects, and studies, this paper highlights conflicts, especially with natural heritage, expressing concerns for the park’s future. The Spatial Plan of the Special Purpose Area of National Park Kopaonik, as a highly important strategic document, leans toward winter activities, prompting a critical review. The paper concludes with suggestions to alleviate winter tourism’s negative impacts and proposes sustainable practices within the realm of protected natural heritage and other human activities.