- Weather
- 35°Ftypical startModelled estimate
- Field size
- ~500 runners
- Course
- Hilly
- Elevation
- 1,100 ft gain
Deception Pass bridge and Puget Sound
PR5Weather8Experience7
Late November · West Coast · Loop
Seattle Marathon
Seattle, WA · Sunday, November 29, 2026
A hilly course through a famously hilly city, run in late November when Pacific Northwest weather turns genuinely cold and wet. Built for runners who want the finish more than a fast time.
Pacific Northwest staple; chilly weather
Opens the race organizer's website
Typical start
34°
Cooler than 97% of U.S. marathons
Modeled historical conditions
Elevation gain
900ft
Flatter than 13% of races
Estimated total climb
Field size
2.5K
Larger than 79% of races
Estimated field
PR potential
4.9/10
Ahead of 8% of races
Almanac model
Percentiles compare this race against all 224 U.S. marathons in the Almanac.
Course profile
900 ft gain
Hilly course, loop.
0510152026.2
Race-day weather
Modeled from location, month and coastal proximity, not verified race history.
6 AM
26°
Start
34°
Midday
41°
ExcellentGoodWarmHeat risk
Typical start sits at 34°F, good conditions.
Typical dew point 22°F, 38% chance of precipitation, wind around 7 mph. All modeled.
The bottom line
This one is about the day, not the clock.
Seattle Marathon is a strong choice for runners who like a course with real character, and the climbing is the point here. The tradeoff is time: race it hard early and the hills will collect later.
Why runners choose this race
A loop course around Seattle, WA, with real climbing that will cost you time if you race it hard early.
The case for it
- Not enough verified data yet.
The tradeoffs
- You are chasing a flat-course PR
Course and logistics
- Course type
- Loop
- Surface
- Road
- Profile
- Hilly
- Total gain
- 900 ft(estimated)
- Field size
- ~2,000-3,000 runners(estimated)
- Crowd support
- Pockets of spectators
- Entry
- Data coming soon
- Start / finish
- Start and finish in the same area
Race details
- Typical timing
- Late November
- Next confirmed date
- Sunday, November 29, 2026
- Region
- West Coast
- Editorial tier
- Featured
- Data last reviewed
- 2026-08-26
- Loop course
- Hilly course
- Destination race
Similar races
Races with a comparable profile.
- Weather
- 61°Ftypical startModelled estimate
- Field size
- ~6,000 runners
- Course
- Hilly
- Elevation
- 1,200 ft gain
Crosses the Golden Gate Bridge
PR5Weather8Experience8
- Weather
- 39°Ftypical startModelled estimate
- Field size
- ~600 runners
- Course
- Hilly
- Elevation
- 1,200 ft gain
Spokane River gorge and "Doomsday Hill"
PR5Weather9Experience7