Spring is going to bring new life to the woodlands at Turkey Mountain, but that’s not the only thing that will emerge as warmer months arrive. The Turkey Mountain Urban Wilderness trail system is undergoing an upgrade, and some of the new trails are already open. The River Parks Authority, working with Progressive Trail Designs to implement the Turkey Mountain Master Plan, has already opened 2 miles of new trails. That stretch of singletrack makes for excellent hiking and running, but also provides something long sought at the park: a welcoming stretch of trail for all levels of mountain bikers. Turkey Mountain is a mountain biking favorite, but most of…