How To Run Your First Ultra-Marathon: From 10K to 50 Miles in Six-Months.EbookHow To Run Your First Ultra-Marathon: From 10K to 50 Miles in Six-Months.byCraig PalmerRating: 4 out of 5 stars4/5Save How To Run Your First Ultra-Marathon: From 10K to 50 Miles in Six-Months. for later