Pedestrian trails is considered one of the most important effective elements whether its formation or urban system, so it's the most important tool in achieving sustainability in urban boundary. Its known that environmental sustainability is a main condition to improve the life type. The research makes a suggestion to improve and develop the usage of site elements of pedestrian trails in addition to clarify the relationship between the components and elements of pedestrian trails formation and its ways to achive environmental sustainability as a tool to evaluate environmental performance of the pedestrian trails with clarifying the arrangement of the sustainable design, the elements forming the pedestrian trails in addition to justify a group of relationships between these criteria.