South Mountain Park and Preserve is turning 100! As part of the centennial celebration, join REI and Andrew Lenartz, author of South Mountain Park: A Guide to the Trails, Plants, and Animals in Phoenix's Most Popular City Park to learn about history and trail recommendations for this local treasure. Whether you are a daily visitor or have yet to visit South Mountain, this session will have something for everyone. There will also be an opportunity to have your book signed by the author.