Lilac Bloomsday 12K
Race Day Weather
Cool start, mild finish
Runners will face a temperature range from 52°F at the start to 56°F at the finish, with a light SSW wind peaking at 9 mph. With humidity at 44%, conditions are favorable for maintaining pace. However, runners should be mindful of crosswinds in the early miles and a headwind in Mile 6, adjusting their effort accordingly. Pre-race temperatures feel as low as 40°F, so a light layer may be beneficial before the start.
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Race Info
The Lilac Bloomsday 12K is a 12-kilometer (7.46-mile) road race held in Spokane, Washington, on the first Sunday in May. Runners start in color-coded waves on Riverside Avenue downtown, and the course mixes hills with flat stretches through the city. It is one of the largest timed road races in the United States, with 32,207 finishers in 2025, and is part of the PRRO Circuit of classic road races. Source
