Linchpin provides structural engineering design, consultation, and investigation for tree and pole mounted structures including Treehouses, Challenge Courses, and Ziplines. We can perform analysis of trees, as well as design and specify structures that will have minimal impact on the tree. We understand the unique challenges of designing and building in trees, including the need to balance safety, aesthetics, and environmental concerns. Notable projects include the Tahoe Challenge rope course, and stunning treehouses in Nicaragua, Santa Rosa, and Bodega.