Seattle Half Marathon takes place on Sun, Nov 29, 2026 in Seattle, United States. The main route is 21.1 km.
- Date
- Sun, Nov 29, 2026
- Start
- Seattle 🇺🇸
- Distance
- 21.1 km
- Climbing
- 249 m
- Level
- Open to all
Your 8-week plan to Seattle Half Marathon
The Build phase starts this week. Built around your fitness and adjusted every day as your form changes; attach the course and it prepares for the climbs too.
Build my planFree to start · No credit card
The UW Medicine Seattle Half Marathon is set on a scenic course featuring rolling hills and views of Seattle's iconic bridges and waterways.
What this race demands
The Seattle Half Marathon demands consistent pacing over a 21.1-kilometer road distance featuring rolling hills.
Aerobic Capacity
Running 21.1 kilometers requires sustained aerobic output and efficient cardiovascular endurance for the duration of the effort.
Rolling Hill Resilience
The course features rolling hills, demanding muscular endurance and pacing discipline to manage changes in elevation without excessive fatigue.
What would it take you?
Pick the level closest to yours for an estimate of finish time on this course and the training a solid preparation needs.
Estimated finish
2:00–2:25
Peak-week training
5–7 h/week
A model estimate from distance, climbing and level, not a promise. Conditions, drafting and pacing move it.
IntervalCoach turns those weekly hours into a concrete plan built around your actual fitness. Start with this race as your goal
Your road to race day
Race day at Seattle Half Marathon is 8 weeks away. This is how a coach divides that time. The first phase starts now.
01Build2 weeks · Oct 5, 2026 – Oct 18, 2026
Progressive overload: training load climbs in waves, with harder weeks stacked on the base and planned recovery weeks that let the gains land.
02Peak3 weeks · Oct 19, 2026 – Nov 8, 2026
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
03Taper2 weeks · Nov 9, 2026 – Nov 22, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
04Race week1 week · Nov 23, 2026 – Nov 29, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.
Frequently asked questions
When is Seattle Half Marathon?
Seattle Half Marathon takes place on Sun, Nov 29, 2026 in Seattle, United States.
How long is Seattle Half Marathon?
The main route is 21.1 km.
What does Seattle Half Marathon demand?
The Seattle Half Marathon demands consistent pacing over a 21.1-kilometer road distance featuring rolling hills.
How much climbing does Seattle Half Marathon have?
Seattle Half Marathon has 249 m of climbing.
Who is Seattle Half Marathon for?
Seattle Half Marathon is open to all participants.
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