
From the Organizer
• Ranked #35 Fastest Marathon in the U.S. (FindMyMarathon)
• 1 in 5 runners BQ
• ~1,000 feet of net downhill with NO Boston Qualifier time penalty
• Smooth, fast rail-trail surface built for negative splits
• Jack & Jill has sent thousands of runners to Boston
• Iconic Snoqualmie Tunnel experience
• Abbott World Marathon Majors Age Group World Rankings Qualifier
• Professionally timed with live tracking, detailed results, and printed results cards
• Super Pacers for key Boston Qualifying times
Over a decade of experience delivering one of the fastest and most trusted downhill races in the country.
What Runners Are Saying
"BQ and PR!! Boston 2026 here I come💙🦄💛 Jack and Jill was my race to get a larger buffer"- Carolyn
"BQ last July at Jack and Jill, Boston 2026 here I come! I love running this course, I would run it just for the peace and tranquility the course provides. P.S. - I love the tunnel, part of the experience" - Jon
"The finish line was awesome! They announce your name and let you know if you qualified for Boston. The crowd was amazing at the finish. And yes, I rang that PR bell with Pride! Would I run this marathon again? Absolutely!" - Annie|
"10 min PR from my Boston Time, so it was very successful! Was a really fun race and loved the finish line!! Such a great atmosphere!"
Events
Weather
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
72°
Typical Low
52°
Chance of Rain
24%
Based on US Climate Normals data from Cedar Lake, 4 mi from the venue.
Host City
Elevation
499 ft
Nearest Airport
BFI
King County International Airport - Boeing Field · 26 mi
Major Hub
SEA
Seattle–Tacoma International Airport · 26 mi
Time Zone
Pacific Time
From Endurance Grid
Line up lodging and travel early to lock in your race weekend.
Race Location
Your Next Start Line
Every finish line starts with a single decision. Claim your spot at Jack & Jill Marathon & Half, put it on the calendar, and turn “someday” into a start date.
47
Days to train
Coming Up
Super Hyak Marathon and Half
Less than a mile away
Fall City Day Run 2026
9 miles away
Bare Buns Fun Run
12 miles away
Blake Pottle Foundation: Opt Outside to Fight Cancer Run/Walk 5K and Kids 1K
Less than a mile away
From Endurance Grid
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
The half marathon is the distance where you find out what you're actually made of. Long enough to demand real preparation. Short enough that it doesn't consume your life to train for it. Most people who run their first half describe it as the race that changed their relationship with what they're capable of. Once you cross this finish line, the bar moves. That's not a warning — that's the point.
Race day energy varies by event size, but the finish line feeling is the same regardless. Big races keep the noise going the whole way. Smaller races give you stretches where it's just you and the miles — and that solitude becomes its own kind of fuel.
The half marathon rewards people who show up for the boring training miles.
How long to train: 10–14 weeks. If you're already running consistently, 10 weeks of structured buildup is enough. If you're building from a casual base, give yourself 14.
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Frequently Asked Questions (FAQs)
Jack & Jill Marathon & Half
Jul 25, 2026