In July 1989, Mike Hartley set the Fastest Known Time (FKT) record for the Pennine Way, running Britain's oldest National Trail in a little over two days and seventeen hours. He didn't stop to sleep, but did break for fifteen minutes for fish and chips. Hartley's record stood for thirty-one years, until two attempts were made on it in two weeks in the summer of 2020. First, American John Kelly broke Hartley's record by less than an hour, then Hall knocked another two hours off Kelly's time. Hall used his record attempt to highlight environmental issues: his attempt was carbon negative, he used no plastics, and he and his pacing runners collected litter as they went, while also raising money for Greenpeace. 'In It for the Long Run' tells of Hall's four-year preparation for his attempt, and of the run itself.