Seattle Waterfront Marathon

USATF Certified

Sunday, May 24, 2026

Seattle, Washington

USATFCourse

Course Information

USATF Certified Course

WA22026RMB · Expires 2032

Certified Course Name

Seattle 1/2 Marathon

Net Drop

+0.32

m/km

Separation

0.8%

start to finish

This course is relatively flat with minimal net elevation change. Loop course — start and finish are close together.

View USATF Course Map (PDF)

Race Details

Race Day

Sunday, May 24, 2026

Course

Loop

Also Offers

26.2M5K run

Registration

Race Website

Official race information

Historical Weather

☀

Avg High

64°F

☽

Avg Low

50°F

☂

Precip

0.07 in

🍃

Wind

11.5 mph

73% humidity·Based on 5-year historical data

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Course Information

USATF Certified Course

WA22026RMB · Expires 2032

Certified Course Name

Seattle 1/2 Marathon

Net Drop

+0.32

m/km

Separation

0.8%

start to finish

This course is relatively flat with minimal net elevation change. Loop course — start and finish are close together.

View USATF Course Map (PDF)

Race Details

Race Day

Sunday, May 24, 2026

Course

Loop

Also Offers

26.2M5K run

Registration

Race Website

Official race information