Seattle Marathon Summer Half Marathon 2026
Best For: Local runners and families looking for a scenic, low-stress loop race without the chaos of a major city marathon.
Course Character: Gently rolling loops with a waterfront out-and-back.
Logistics Score: ⭐⭐⭐⭐
Value for Money: ⭐⭐⭐
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This isn't your high-stakes, elite-only championship race; it’s a community-driven weekend in one of Seattle’s most beautiful green spaces. If you want a predictable course where you can actually see your support crew every few kilometers, this is a winner. Just don't expect a flat, pancake-style course.
Seattle Marathon Summer Half Marathon 2026 takes place on Saturday, June 27, 2026, in Seattle, United States. You can choose from a Half Marathon, 10K, 5K, a 5K/10K bundle, or a Kids Fun Run. The event is centered around the stunning Seward Park, offering prime Pacific Northwest views.
What is the terrain like on the course?
Don't let the "park" setting fool you into thinking it's a flat track. Seward Park is known for its paved loop, but it features consistent, gentle rollers that will test your legs, especially if you are doing multiple laps. For the Half Marathon, you get a bit of variety with an out-and-back section on Lake Washington Blvd S, which helps break up the monotony of the loop. It’s a great course for pacing practice, but keep your effort levels honest on those short climbs.
Maps for the various distances can be found on Plotaroute ↗ and Mapmyrun ↗.
Which distance should I pick?
The Half Marathon is the flagship, starting at 07:00 AM, and it offers the best scenery by mixing the park loop with the waterfront stretch. If you want something substantial but aren't ready for the half, the 5K/10K bundle (15km total) is a clever way to get a longer training effort in without the full commitment. The 10K and 5K are excellent for beginners or those wanting a quick morning effort before exploring the city.
What should I expect regarding weather and gear?
Late June in Seattle is usually beautiful, but "beautiful" in the PNW can mean anything from 60°F (15°C) and overcast to a sudden 75°F (24°C) heat spike. Since much of the course is near Lake Washington, you might encounter a breeze, but the sun can feel intense on the open waterfront stretches. I'd recommend lightweight, breathable gear and a high-quality SPF. If you're a cautious runner, bring a light windbreaker just in case the typical Seattle clouds roll in.
How much is it going to cost me?
The pricing is mid-range for a US-based road race. Expect to pay around $122.86 for the Half Marathon, $78.68 for the 10K, and $62.52 for the 5K. The 5K/10K bundle at $118.50 offers decent value if you are looking to maximize your mileage for the day. It’s a fair price for a USATF-certified course in a prime location.
How do I handle the logistics of getting there?
Most international travelers will fly into Seattle-Tacoma International Airport (SEA). From there, you're looking at a 20-30 minute drive to the city center, but getting specifically to Seward Park can take longer depending on Seattle's notorious traffic. For the easiest experience, look for accommodations in South Seattle or near Lake Washington to avoid the downtown congestion on race morning. If you're picking up your packet early, note that options are available at West Seattle Runner or Super Jock N Jill Green Lake.