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Half marathons in Eastside & South King (2026-27)
Updated
1 half marathon is coming up in Eastside & South King in the next 90 days; the next is Lake Washington Half Marathon on Saturday, October 17 in Kirkland. 14 half marathons are listed in Eastside & South King for the next 12 months.
All SeattleSeattle (city) (35)Eastside & South King (14)Snohomish County (11)Tacoma & South Sound (3)
By date
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Lake Washington Half Marathon
Sat Oct 17 · 8:00 AM · Kirkland · Eastside & South King
Half marathonTrail
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Woodinville Half and 10K
Sat Feb 27 · 8:00 AM · Woodinville · Eastside & South King
10KHalf marathonTrail
from $60Goes up Nov 16 -
Brooks Lake Sammamish Half Marathon presented by REI
Sat Mar 6 · 7:30 AM · Redmond · Eastside & South King
Half marathonTrail
from $91Goes up Nov 1 -
from $51Goes up Nov 1
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Kirkland Half Marathon & 5K
Sun May 2 · 7:30 AM · Kirkland · Eastside & South King
1K5KHalf marathon
from $15Goes up Nov 1 -
Spring - Mud Mountain Dam Marathon & Half Marathon
Sat May 29 · 7:00 AM · Enumclaw · Eastside & South King
Half marathonMarathon
from $105Goes up Jan 1 -
Super Hyak Marathon and Half
Sat Jun 19 · 7:00 AM · North Bend · Eastside & South King
Half marathonMarathon
Reg. closed -
Snoqualmie Valley Half
Sat Jun 19 · 8:30 AM · Carnation · Eastside & South King
10KHalf marathonTrail
from $54Goes up Nov 1 -
from $75Reg. closed
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from $37Goes up Nov 1
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Iron Horse Half Marathon
Sun Aug 29 · 7:00 AM · North Bend · Eastside & South King
Half marathonTrail
from $97Goes up Jan 1 -
Fall - Mud Mountain Dam Marathon & Half Marathon
Sat Sep 4 · 7:00 AM · Enumclaw · Eastside & South King
Half marathonMarathon
from $105Goes up Jan 1 -
Redmond Harvest Half Marathon
Mon Sep 6 · 8:30 AM · Redmond · Eastside & South King
Half marathonTrail
from $59Reg. closed -
Run for the Gnomes Half Marathon & 5K
Sat Oct 2 · 8:00 AM · Maple Valley · Eastside & South King
10KHalf marathon
from $33Goes up Jan 1
Quick answers
How many half marathons are in Eastside & South King in the next 3 months?
1 half marathon is listed in Eastside & South King between October 17 and January 15. The next is Lake Washington Half Marathon on Saturday, October 17 in Kirkland.
When does the next early-bird price end for half marathons in Eastside & South King?
Brooks Lake Sammamish Half Marathon presented by REI: the Half marathon goes from $91 to $96 after November 1. 9 more of these half marathons publish a later price increase.
Are there half marathons in Eastside & South King this weekend?
Yes, 1: Lake Washington Half Marathon (Sat).