The Korean government established Haeparang Trail, a 770-km paved trail that intersects 10 cities in Korea’s eastern region. The trail is frequented by residents, domestic visitors, and international tourists, which has enhanced the local and regional economies. The purpose of this study is to examine the interrelationship among host community residents’ attitudes toward the government’s tourism planning, perception of tourism impact, quality of life, and support for environmental development within the context of this trail. A conceptual model was empirically tested based on data collected from 496 residents in four cities. Findings indicate that residents’ attitudes toward the government’s tourism planning positively enhance their perceptions of tourism’s impact and quality of life. Consequently, residents’ support for environmental development is significantly influenced by their perceptions of tourism’s impact and quality of life. Overall, the results identify the factors that influence community residents’ support for environmental development initiatives, which can assist the government in planning and policy formulation. Subscribe to JPRA