The annual Defend Lawrence! 5K kicks off early Sunday morning in front of Ad Astra Running, 734 Massachusetts St.

Held every year on the anniversary of Quantrill’s Raid, this year’s free fun run will start at 5:05 a.m. sharp, “the instant at which Quantrill launched his attack in 1863,” according to Ad Astra. Routes include a one-mile option, and walkers are encouraged as well as runners. “Defenders,” as participants are aptly called, will gather in front of Ad Astra at 4:45 a.m.

The event is open to all, with the intention of commemorating the “pluck and resilience of Lawrencians past and present.” Festivities also include mimosas after the race.

For more information, call Ad Astra Running at 830-8353.