Abstarct: en variables is a correlation and the statistical population studied in this study consisted of all sports tourists in the Al-Nagdereh forest of Gorgan in 1400. The number of statistical populations studied was unknown. The minimum sample size was 5 times the observable variables (33 variables) i.e. 165 and the maximum sample size was 20 times the observable variables i.e. 660. The sampling method used in this study was unlikely to be available. The data collection tool in this study was a questionnaire. The questionnaires used included 4 sections: demographic information, standard questionnaires of perception the quality of tourism of Yin et al. (2021), environmental responsible behavior of Yin et al. (2021), and attachment to the place of Robkinos et al. (2013), with There were 5 Likert options. A total of 216 respondents answered these questionnaires completely and flawlessly. After collecting information through questionnaires, structural equation modeling including confirmatory factor analysis and path analysis were used to analyze the data. The software used for data analysis were AMOS and SPSS. The results of the present study showed that understanding the quality of tourism has an positive and effect on the responsible environmental behavior of sports tourists; perception the quality of tourism affects the attachment to the place of sports tourists; Attachment to place positively and significantly affects the responsible environmental behavior of sports tourists: and attachment to place has a significant mediating role in influencing the perception of tourism quality on the responsible environmental behavior of sports tourists. Therefore, in order to obtain the two variables of responsible behavior and tourists' attachment to that place, we should always try to provide services and raise the desired level of quality in order to create a pleasant experience for tourists and turn them into satisfied tourists. Tourists who, due to the formation of a positive personal experience, will not only return to the forest, but also recommend it to otheres.