Running guides
Longer pieces on the decisions the calculator cannot make for you: how much training a first marathon actually takes, and how to pick a goal time you can defend.
How to Run Your First Marathon
What first marathon training actually involves: the base you need, how the long run builds, picking a goal time, and the pacing mistake that costs most first-timers their race.
How to Set a Realistic Marathon Goal Time
Use a recent race result rather than a round number. The Riegel formula, worked examples, the adjustments worth making, and how to sanity check the pace before you commit to it.
Pacing a specific race
Course by course guides to what each major marathon does to your splits.