I did the London marathon this year. and, having moved to the Peak District, have started fell running. I haven't done any races longer than 6 miles (yet). I'm (possibly rather rashly) reading Feet in the Clouds (brilliant book about nutty fell-racing, stuff like the Bob Graham round) and can't help wondering if I could tackle one of the more challenging races - a 20 miler perhaps, next spring. My big fear though is navigation. and having to do as much, if not more, training as I did for the marathon. I wondered if there was anyone here on mn with any relevant experience (too scared to go on any of the fell-running forums...)