A national social survey indicated that the most popular outdoor recreational activity in the USA was walking; 134 million (67 percent) of American people of sixteen years old or over participated into it (Marion and Leung, 2001). Walking happens on neighborhood streets as an everyday activity; however, more commonly on urban, suburban, rural or wildland recreational trails (Cordelll, 1999). Many recreational activities related to trails, e.g., running or jogging, biking, hiking, have experienced a dramatic increase in terms of the participation rate (Cordelll, 1999). Among all recreational activities, hiking is believed to be the most common one, which produces significant impacts on the ecological system (Cole, 2004). As one of the most common and important infrastructure components, trails are constructed and managed to provide not only an access to destinations in remote protected natural and nonroaded areas (Marion and Wimpey, 2017) but also safe and high quality recreational experiences (Marion and Leung, 2004), nature-based activities such as mountain biking and hiking (Ballantyne and Pickering, 2015a) as well as wildlife observation (Marion and Leung, 2001; Santarém et al., 2015). Hundreds of thousands of kilometres of rails for recreation are found in natural areas with a high value of conservation. In those areas, recreational trails also function as a protection of nature and natural resources from concentrating users' activities and their impacts on narrow and resistant trail surface (Marion and Leung, 2001; Marion and Wimpey, 2007). Therefore, recreational trails are of great importance socially and environmentally. Research have been done into various types of trails such as formal, informal, bare earth, non-specified, tarmac, paved, sand, gravel, grass and raised metal walkway (Ballantyne and Pickering, 2015b). However, no matter how many categories into which trails are classified, they do exert certain impacts on the environment. Those impacts can be different depending on their design, construction, location, maintenance and use (Ballantyne and Pickering, 2015a). China is now experiencing a rapid increase in demand for recreational activities in natural environment (Zhou et al., 2013). In order to meet this national need, China has set up many protected areas (PAs) such as national forest parks and national parks, increasing from 600 in 1990 to 2,750 by 2016 (Ministry of Environmental Protection, 2016). This poses great challenges to China because those PAs must be under proper management and face problems such as commercial interests and local human activities (Zhou et al., 2013). Many national parks in China have focused on social and economic benefits (Wang et al., 2012). Many problems have emerged in PAs, e.g., visitor crowding and larger construction or