Seattle, United States

Seattle Marathon

Sunday, November 29, 2026
Unknown

Course Profile

Difficulty
Unknown
Terrainroad

Typical Weather

Registration

Entry Type

When to start training

229 days until Seattle Marathon

12-week plan
Sunday, September 6, 2026
Starts in 145 days
16-week plan
Sunday, August 9, 2026
Starts in 117 days
20-week plan
Sunday, July 12, 2026
Starts in 89 days

Plan start dates calculated from Seattle Marathon race day on Sunday, November 29, 2026.

Your 16-week training phases

From first base run to race day at Seattle Marathon

PhaseDatesWeeksFocus
baseAugust 9, 2026 – September 12, 20265Build aerobic capacity with easy mileage
buildSeptember 13, 2026 – October 17, 20265Add tempo runs, hills, and mid-long runs
peakOctober 18, 2026 – November 14, 20264Race-specific workouts at goal pace
taperNovember 15, 2026 – November 28, 20262Reduce volume, sharpen, arrive fresh

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