I have 10k ocean swim experience but want to venture to marathon swim training, this being 24-26 miles. My best 10k is 3hrs 21 min and my best river swim for 4.8 was 2hrs 10 min. I learned to swim late in life 29 and have been gaining open water skills. I'm now a master swimmer and want to swim the above distance. How many months training to reach the above goal , mileage necessary, and swim workouts? I realize currents and weather conditions are a factor in the successful completion for this distance as well. Thank you.
