Welcome!
If you are looking for a way to create custom terrain-adjusted marathon pacing strategies, marathon pace bands, or marathon pace charts for specific marathons, look no further - you will find nothing else as flexible, accurate or complete as the pacing spreadsheets found here.
These spreadsheets allow you to easily test out various pacing strategies for your target race, visualize each pacing strategy superimposed on a detailed elevation chart of the course, and then print as many pace bands as you need for various goal times and pacing strategies. When you consider all the time and effort needed to prepare for a marathon and the importance of pacing it correctly, these spreadsheets are well worth the small fee I charge.
This site has links to a lot of additional information related to long distance running, including free marathon training plans for all levels of experience
(scroll down for more info).
Good luck with your training and racing!
Greg Maclin