Official date status
UW Medicine Seattle Marathon and Half Marathon is listed for November 29, 2026. This date refers to the race represented in this guide; other distances and expo activities may run on different days.
Official date information checked on 2026-10-18. This check covers the date status, not entry availability or final race operations.
Date and race-format check
The organizer links the November 29, 2026 UW Medicine Seattle Marathon and Half Marathon registration from its event homepage. Select the full-marathon category and use the final participant guide for its start access, route and time limits. This is a 2026 date; a future 2027 date is not established by moving it forward one year.
Seattle Marathon 2026: answer first
The UW Medicine Seattle Marathon is Sunday, November 29, 2026. The organizer lists a 7:30 a.m. full-marathon start near 5th Avenue and Harrison Street at Seattle Center, with the finish at Pier 66. The half marathon is listed for 7:00 a.m. The expo is scheduled across November 27 and 28.
The organizer's FAQ said the current route material was still coming when reviewed. Do not copy a historic map or infer the 2026 turns from an older edition. Build travel, spectator and pacing decisions from the final official route once it is published.
Separate confirmed logistics from pending course detail
Rehearse an early breakfast and arrival sequence before race week. Keep course-specific hill or turn claims provisional until the organizer publishes the 2026 route. General strength and varied-terrain preparation can still be sensible, but it is not evidence of the exact course.
Work backward from November 29 and choose the training plan by current frequency, long-run readiness and recovery. Do not let an unconfirmed route become an excuse for speculative workouts.
Race-week check
Confirm the final route, transportation, start procedures, bag rules, aid and weather on the official site. Stop and seek appropriate care for severe symptoms or movement-changing pain.
Course + conditions (what should change in training)
- Surface: unknown.
- Course difficulty: rolling.
- Climate context: Avg highs ~ 10°C, lows ~ 6°C • Avg monthly precip ~ 176 mm • Avg wet days ~ 20 days.
Course pacing signals (what to rehearse)
- Surface unknown: verify the course surface and keep pacing effort-first.
- Rolling profile: keep effort even; let splits drift and protect the late miles.
- Crowds/wind rule: treat headwinds and congestion as “hills” and stay effort-controlled.
Climate-specific adaptations (gear + fueling)
- Rain/wet roads: prioritize anti-chafe, socks, and traction; avoid brand-new shoes.
- Fueling rule: practice carbs early and on schedule; do not “wait until you feel it.”