Seattle Half Marathon

Seattle, WA|Sunday, November 29, 2026|228 days away
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Weather

Climate Avg
TimeTempDew PtHumidityWindConditions
Start32.3 – 41.2°F34° Crisp79 – 96%5 mph NEPartly cloudy
8:00 AM32.4 – 40.9°F34° Crisp78 – 95%5 mph EPartly cloudy
Finish31.6 – 40.7°F32° Crisp75 – 97%5 mph EPartly cloudy

Based on 3-year average for this date. Real forecast available in 212 days.

Elevation Profile

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Course Stats

Net Elevation (downhill)
-156 ft
Distance
13.11 mi
Total Gain
+1,129 ft
Total Loss
-1,285 ft
Max Grade
20.1%
Altitude
230 ft

Mile Splits

MileGrade
1-0.9%
2+1.1%
3-0.7%
4-0.7%
5-2.1%
6+2.2%
7-2.8%
8+1.0%
9-0.1%
10-0.3%
11+1.9%
12-1.2%
13-0.8%
14+5.1%

Seattle Half Marathon Pace Calculator & Race Plan

The Seattle Half starts at the Space Needle, heads south through downtown, then runs north on the I-5 express lanes before crossing to the University of Washington campus. About 500 feet of gain from the rolling terrain.

Late November in Seattle means cool, likely wet conditions. Our model adjusts for the hills and the Pacific Northwest weather.