Washington · Race calendar
Upcoming running races in and near Seattle, Washington - 5Ks, 10Ks, half marathons and more, with dates, pricing, finish-time stats, start-line maps, and local run clubs to train with.
72 upcoming races · 20 with finish-time stats
Seattle running is defined by contrast: one mile you're on a flat, paved waterfront corridor with Puget Sound and the Olympic Mountains ahead of you, the next you're climbing a forested bluff in Discovery Park or threading dirt paths through the Washington Park Arboretum that feel nothing like a city. The Burke-Gilman Trail, Alki Beach, Green Lake, and Seward Park each draw their own crowd, and the city's hills mean even familiar loops rarely feel routine.
The weather is the silent training partner every Seattle runner knows. Long, rainy winters push people onto well-surfaced urban corridors under layers, and then summer arrives and the whole city migrates to the waterfront and lake shores when Mount Rainier finally clears the haze. Race-day conditions here can be genuinely spectacular, or genuinely wet - sometimes both in the same morning.
By the numbers
The Seattle races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
Within 100 miles
More race calendars close to Seattle. Miles are measured center to center, so treat them as a rough guide.
Train for it
The easiest way to a start line is a standing group run. These Seattle clubs welcome runners of all paces.
Browse all Seattle run clubs →How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Oct 8, 2026.
Across the 15 RunSignup 5K editions with published results on RunSesh, walkers and charity entrants included, the median finish time was 35:28 - with the median winner crossing at 18:04 and the median last finisher at 1:16:53. For the 10K, across 8 editions with published results, the median finish was 1:00:12. Fields are real mixes of runners, joggers, and walkers, so the range is wide.
The spread across Seattle races is genuinely wide. The median last finisher in the 5K editions with published results crossed at 1:16:53, which tells you these fields include plenty of walkers and people taking their time. You will not be alone at the back, and the fields in races with published data run into the hundreds.
There are eight clubs active in the city:
Whether you want road miles along the Burke-Gilman Trail, trail runs in Discovery Park, or group outings around Green Lake, there is a club that fits.
Fall is the busiest stretch, with 31 races running from September through November and October alone carrying 15 of them. Summer brings 18 races between June and August, and winter holds a steady 16 from December through February.
If you want the widest choice, fall is the window - but if you prefer smaller fields and fewer scheduling conflicts, the quieter months give you room to breathe, with March the quietest single month at just 1 race.
Yes, 3 races around Seattle get you off the pavement: 1 is a trail race, and 2 mix road and trail.
