A question for anyone that's finished a marathon......how many long runs did you do before the marathon and what was the longest distance? I've got a marathon in late September. I've done 18, 19 and 20 mile runs so far. I'm planning a 22 mile run about 3 weeks before the race and then tapering gradually but I'm not sure how many more 18+ milers before then. I seem to have benefitted from the long runs but don't want to overdo it!!