The area of the Krka River was proclaimed national park in 1985. It coverts a surface of 142 km2, and the fundamental phenomenon that led to the protection of the category of national park is the part of the river Krka River with the canyon and trenches on sedimentary barriers, along with a number of other geomorphological, hydrological and landscape values. Krka National Park is the second most visited and attractive national park of the Republic of Croatia, after the Plitvice Lakes National Park. The fact that the number of visitors to the Krka National Park has more than doubled in less than two decades affected the components of sustainable development of the Park and its surroundings. The increasing number of visitors in conditions of extreme weather (seasonality of tourism) and spatial limitation (in the area of the underlying phenomenon), as well as the rise in interventions into the area on account of servicing tourist, have inevitably left a mark on the bearing capacity of certain parts of the area. This calls for the need for continuous monitoring of all aspects of spatial tourism impact, being the prerequisite for a more harmonized social, economic and ecological development of the Krka National Park. Due to the exceptional tourist attraction of the Park area, tourism and recreation have been included into the idea of the Park up to a degree at which they will not endanger the ecological system and its original quality, as this is exactly what the concept of sustainable development of tourism in this area is based upon. Krka National Park is inextricably linked to the area which directly surrounds it with regard to the fulfillment of its basic functions, its protective, scientific, educational and tourist-recreational functions.