I do a lot of mountain bike trail building and maintenance. Here in SE Michigan we were heavily impacted by Emerald Ash Borer, and many of our trails are in woo

I do a lot of mountain bike trail building and maintenance. Here in SE Michigan we were heavily impacted by Emerald Ash Borer, and many of our trails are in wooded areas that contained a lot of ash. Because of how the Ash Borer kills trees what results is a tree that rots at the base and falls over, with the core of the trunk a nicely aged hardwood. This makes cutting out the dead trees as they fall across the trail particularly difficult.