Abstract：The extreme weather and climate change have an impact on the participation of outdoor recreational activities. Therefore, this study examined the characteristics of hikers in Taipei, the weather condition which the hiker would give up their hiking, and the acceptable level of weather condition for hikers. This study employed a survey to measure the acceptable level of weather condition and hiking experience. 360 participants were selected from hikers on urban tails, suburban trails, and the mountaineering associations in Taipei. The frequency of hiking, the length of hiking time, and the hiking experience divided the hikers into two groups. The first group was the hikers who frequently used the suburban area trail (Urban group). The second group was the hikers who had experience on mountain trails (Mountain group). The results showed that the hikers gave up hiking when the temperature was higher than 37.5℃ or lower than 3.07℃. The precipitation was larger than 10mm per hour. The wind speed was higher than 17-27 per hour. The degree of ultraviolet index (UVI) was defined as the over level. However, 40% of hikers showed that they would not give up hiking because of humidity. The mountain group and the urban group were significantly different on the acceptable levels of the weather conditions. This study suggested that further studies should examine the hikers' coping behavior in climate change. (Full text)