Races near Seattle in October 2026
Updated
25 races are on the calendar near Seattle in October 2026, starting with Lake Washington Half Marathon on Saturday, October 17 in Kirkland. Listed by date, with prices and early-bird deadlines where the race publishes them.
Oct 2026Nov 2026Dec 2026Jan 2027Feb 2027Mar 2027Apr 2027May 2027Jun 2027Jul 2027Aug 2027Sep 2027
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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Haunted 5K, 10K & 13.1M at Everett, WA (42)
Sat Oct 17 · 8:30 AM · Everett · Snohomish County
5K10KHalf marathon
Reg. closed -
Reg. closed
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Reg. closed
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Reg. closed
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Reg. closed
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Reg. closed
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from $15
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from $25Goes up Oct 18
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Reg. closed
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from $32.50Goes up Oct 18
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from $35
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from $30
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from $40Goes up Oct 19
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Issaquah Schools Foundation Monster Mash 5K
Sat Oct 24 · 10:00 AM · Issaquah · Eastside & South King
5K
from $40 -
from $50Goes up Oct 24
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from $37
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from $50
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Ten Trails Active Club Trot n' Treat Relay Scramble
Wed Oct 28 · 6:30 PM · Black Diamond · Eastside & South King
11KTrail
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Halloween Trick or Trot Run 5K/10K/13.1 Seattle
Sat Oct 31 · 7:30 AM · Seattle · Seattle (city)
1 mile5K10KHalf marathon
from $30 -
PB&J Fuel Run 5K/10K/13.1 Seattle
Sat Oct 31 · 7:30 AM · Seattle · Seattle (city)
1 mile5K10KHalf marathon
from $30 -
Cougar Mountain Trail Run Series (October)
Sat Oct 31 · 8:00 AM · Bellevue · Eastside & South King
5K7.6 miles19.5 miles50KTrail
from $40 -
from $72.50Goes up Oct 30
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from $35
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from $39Goes up Oct 25
Quick answers
How many races are near Seattle in October 2026?
25 races are listed near Seattle in October 2026. The first is Lake Washington Half Marathon on Saturday, October 17 in Kirkland, and the last is Trick or Treat 5k on October 31.
What is the cheapest race near Seattle in October 2026?
Alaska Airlines Dawg Dash 5K/10K on October 18 has the lowest listed entry fee: $15. Prices are before the registration platform's processing fee.
When does the next early-bird price end for races near Seattle?
West Seattle Monster Dash: the 5K goes from $40 to $45 after October 19. 3 more of these races publish a later price increase.
Are there half marathons or marathons near Seattle in October 2026?
Yes: 5 half marathons and 0 marathons. The first is Lake Washington Half Marathon on October 17.