20-Week Kansas City Marathon Training Plan

The 2027 Kansas City Marathon is scheduled for October 16, 2027, so the 20-week window opens around May 29, 2027. Treat that as the outside edge of the window, then line week one up with the plan's normal weekly rhythm.

Use the longer window to make the early build calmer, not to add five months of hard training. The plan should begin close to your current load, hold most running easy, and delay the biggest race-specific work until the middle of the cycle. The course does not change the opening load you can handle, so choose from your current mileage and recent longest run before adding race-specific terrain.

Build general durability first. Add the race's hills, flat sustained running, downhill exposure, heat, or humidity in layers after the weekly rhythm is stable, then make the final long runs the most course-specific. Train for the Kansas City Marathon by building downhill durability, not just hill strength. Most runners preparing for a hilly race do hill repeats and jog the descents easy, which trains exactly half the problem. This course hands back all 1,046 feet it takes, so your quads need specific preparation for absorbing that.

Do not double weeks or cram missed mileage into the remaining calendar. Use your current mileage, recent longest run, experience, goal, and available days to choose a plan that can enter at an appropriate point while preserving the taper.

Hilly throughout. The course gains about 1,046 feet and loses the same amount, ranging between 767 and 1,002 feet above sea level on a loop from Theis Park. There is no flat recovery stretch to speak of, and the descents are long enough to damage untrained quads well before the finish.

No, not if qualifying is the only goal. The course is certified and Boston eligible, but just 2.4 percent of 2025 finishers ran qualifying times, following 4.5 percent in 2024 and 5.2 percent in 2023. The constant climbing costs most runners minutes. Pick a flatter race for a qualifying attempt.