From your first 5k up to trail marathon level, this is the ultimate guide to trail running.From complete beginners to seasoned off-road runners,The Ultimate Trail Running Handbook has all the training and nutrition advice, skills, gear and motivation you need to become a fit and confident trail runner.There are training plans that take newcomers from 5k parkrun level all the way to a first trail marathon. And if you're already an experienced runner, you'll find the strength-w