Surveys for visitor's awareness and on-the-spot investigations at Odae Mountain National Park were conducted for activation of nature interpretation. As a result, many problems on observation trails as the object of the nature interpretation were identified. The nature interpretation is not functioning fully for the side of environmental education. The situation and problems of nature interpretation were analyzed in depth based on the survey of the visitors. In order to improve roles of the nature observation trails and solve the present problems immediately, suggestions are as the followings. 1)Road resurfacing and space development needed to solve the problems of existing nature observation trail. 2)Public relations for nature observation trail and production of signboards promoting visitor's interest. 3)Development of nature observation trail used only for nature interpretation 4)Development of adequate Korean interpretation program based on systematic nature interpretation models from other developed countries