How fast can an 18 year cross country runner with a PR of 16:30 for a 5k running 45-55 miles per week run a marathon with only 3 months of marathon training?
How fast can an 18 year cross country runner with a PR of 16:30 for a 5k running 45-55 miles per week run a marathon with only 3 months of marathon training?
2:51
With proper training a 16:30ish 5k can prolly land someone in the 2:37-2:45 range. For a high school runner without a huge base it would be a mistake to go out at that pace. Probably 2:50-55 is more realistic but why rush it?