The Treeline, Allen Creek Urban Trail is a transformative biking and walking trail project in Ann Arbor, Michigan, managed by The Treeline Conservancy. The 2.75-mile trail aims to provide an easy, green, and alternative way to travel through the city, enhancing connectivity and promoting sustainability. Officially incorporated into Ann Arbor's Master Plan in 2017, the project has garnered significant community and municipal support, including a $55 million vision for its development. Executive Director Ellen "Nan" Plummer leads the initiative, which has received accolades such as the Planning Excellence, Transportation Planning Award from the American Planning Association.