What are the most effective methods for incorporating ecological health into trail design, and how can trail builders balance the needs of cyclists and other users with the need to minimize environmental impact? Should trails be designed with specific features, such as bridges or boardwalks, to reduce erosion and protect sensitive habitats, or are there other strategies that can be employed to mitigate the effects of trail use on the environment? How can trail designers and builders prioritize ecological health while still creating trails that are enjoyable and challenging for cyclists, and what role should cyclists play in advocating for environmentally sustainable trail design? Are there any examples of trails that have successfully balanced the needs of cyclists with ecological health, and what lessons can be learned from these examples?