20-Week Grandma's Marathon Training Plan

The 2027 Grandma's Marathon is scheduled for June 19, 2027, so the 20-week window opens around January 30, 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. A June race means a spring buildup, and for Midwesterners that's training through the tail of winter into perfect April and May weather. The gamble is race day itself: lake-cooled and ideal most years, warm occasionally. Do some of your late long runs at the warm end of the day so a sunny year doesn't catch you unprepared.

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.

Most Stride marathon plans run 12 to 20 weeks, putting a Grandma's buildup in the late winter and spring. Get matched in the app and Stride maps every week from today to Canal Park.

Yes: gently rolling with a slight net downhill, point-to-point along the lake, and June mornings that the lake usually keeps cool. It has a strong PR and BQ reputation, especially for runners who save something for after Lemon Drop Hill.