This study was conducted to understand the weather characteristics of the mountain environment and the thermal comfort of Gyeryongsan National Park trail and to provide information on activity time, activity space, and activity amount. For the analysis of the thermal comfort of the trail, the temperature of the city center in summer, the average temperature of the National Park Disaster Prevention Weather System (AWS), and the trail. Also, Microclimate elements and canopy closure were also measured in four major trails in Gyeryongsan National Park. After investigating a total of 240 points, thermal comfort was identified. When comparing the average temperature of the city center, National Park AWS, and trail, the average temperature was higher in the order of the city center, Gabsa AWS, Donghaksa AWS, Gabsa Trail, and Donghaksa Trail. As a result, it means that the thermal pleasure experienced by visitors should be considered. According to a survey of four major trails, the average canopy closure is Donghaksa~nammaetop route was high in the order of Donghaksa~Gwaneumbong route, Gabsa~Yeoncheonbong route and Gabsa~Geumjandigogae route. When PMV(Predicted Mean Vote) is 2.8MET, The PMV was highter in the order of Gabsa~Geumjandigogae route, Gabsa~ Yeoncheonbong route, Donghaksa~nammaetop route, Donghaksa~Gwaneumbong route. Through the survey, time information, spatial information, and activity information with high thermal comfort could be presented. By grasping the thermal comfort characteristics of the trail, we intend to lay the foundation for forest trail management measures that can increase the amenity of the trail.