The Medvednica Nature Park is one of the most famous and most visited Nature Parks in Croatia. It is of exceptional importance for the local population and for the many tourists who are increasingly visiting the city of Zagreb. On the summit area of ​​the mountain, just below the highest peak of the Park, is the Sljeme Ski Resort. The ski resort is of exceptional importance for Zagreb, the largest city in the region and an important broadcasting center with by far the largest number of skiers in the Republic of Croatia. Like PP Medvednica, the ski resort is a favorite excursion destination of the local population, the main base for all those who ski competitively or recreationally, and has a long tradition of winter sports. Winter sports tourism is a specific form due to the location of the event, but also numerous features that distinguish it from other specific forms of tourism. As the protected area of ​​Medvednica is a sensitive natural resource, any further development of tourism represents a violation of the original forest area. Accordingly, the third chapter is dedicated to the Nature Park itself, the development of ski resorts in the protected area and sustainable development. Primary research was used to investigate the perception of the local population in order to find out what their views are about the current offer and the further development of winter sports tourism in the Park area. The research gains importance by taking into account the construction of a new cable car, the increasing impact of climate change, the cancellation of the FIS Snow Queen men's race, the highest level of competitive skiing, and numerous questions about the financing of infrastructure in the Park area. Primary research has shown that skiing is a very popular activity in the Park area for local residents, and less so for tourists as part of Zagreb's additional offer. The respondents also understand the economic and social (primarily health, but also promotion of the city) benefits of winter tourism development, but they are also aware of the negative environmental impact and threat in the form of climate change. They also believe that it is necessary to improve the infrastructure of the ski resort itself for further development.