The purpose of this study is to determine those factors critical in the determining of regional trail routes. Initially, a consideration of the concept of the regional trail was conducted through literature reviews and 13 planning elements were determined from previous studies related to trail planning and trail construction studies. An additional 13 items were taken from literature research related to nature experiences or were sourced by interviewing experts. To verify these planning elements, a survey of experts was conducted. Individual elements were assessed concerning their degree of importance. As a result of this survey, it was found that the protection of ecologically sensitive areas and the use of existing trail routes are important route planning factors. These planning factors can be used for making decisions regarding regional trail route directions and situations.