Runners spread across a city avenue during a marathon

Lilac Bloomsday Run

It has historically been one of the largest road races in the United States by number of participants.

Prepare for Lilac Bloomsday Run

A plan built from your answers and your race date.

10K training plan

The Lilac Bloomsday Run takes place in Spokane, in eastern Washington State. The course is urban and entirely paved, working out through the city before turning back toward downtown. Spokane's terrain delivers some climbing in the second half of the route, but the course stays runnable and welcoming to a very broad field of participants.

The race owes its reputation to its size: it has historically ranked among the largest road races in the United States by participation. A single distance is offered, the 12K, which puts the entire field on the same course and produces the atmosphere of a genuine mass participation event from front to back.

The formats

One format only.

Format	Distance
12K	7 mi

Organizer information, checked on September 21, 2026 · bloomsdayrun.org

When to start

A build for this distance usually runs 8 to 12 weeks. Counted back from race day, that puts the start somewhere between February 1, 2027 and March 1, 2027.

These ranges are working conventions, not a research finding — no trial has compared plan lengths against each other. What matters more is that the plan was built for the weeks you actually have, rather than shrunk down from a longer one.

How to choose your start date

When to start

February 1, 2027

→ March 1, 2027

Worth reading before you enter

Races and distances 10K, half, marathon: what each one really asks They are all running. They are not the same event. What limits you, how long you need, and how the race falls apart — all three change with the distance. Read Races and distances The big marathons: what each one actually demands A marathon is 42.195 km everywhere. What changes is the profile, the crowd, the weather you are likely to get — and so what your training should emphasise. Read Training Eating and drinking: what’s proven, what isn’t This is where confident advice most often runs ahead of the evidence. Some of it is well tested. Some is opinion wearing a number. And one common habit can kill you. Read

Questions

What is the date of Lilac Bloomsday Run in 2027?

Lilac Bloomsday Run is run on Sunday, May 2, 2027 in Spokane. Date published by the organizer, checked on September 21, 2026.

How long is the Bloomsday Run?

One distance is offered: a 12K covering 12 km, run on roads through Spokane. Every participant, whatever their level, starts and finishes on that same course.

Is the Bloomsday Run course hard?

The course is urban and generally runnable, with some climbing in the second half. Over 12 km, the difficulty comes mainly from your own pace and from the density of the field at the start.

Other races

This list keeps growing; it draws no line. A race that is missing is prepared for in exactly the same way.

Charleston / Mount Pleasant · United States10K Cooper River Bridge Run Apr 3 Bridge and ranking among the largest 10Ks in the United States. Atlanta · United States10K Northside Hospital Peachtree Road Race July The Northside Hospital Peachtree Road Race is a 10K road race held in Atlanta, Georgia, every July 4. Its Falmouth · United States10K ASICS Falmouth Road Race Aug 15 The iconic Cape Cod coastal course carries a World Athletics Label Road Race designation. Your race is not here? Tell us about your race You can prepare for it all the same. Any race, anywhere, and even a goal without a race.

Your race is on the calendar. Your plan should be too.

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