Leaky Hourglass Ultra

Leaky Hourglass Ultra, hosted in Half Way, Missouri, is a Last Man Standing ultramarathon with a twist: each lap of the 4.167-mile out-and-back course reduces the cutoff by one minute. Runners traverse a chip-sealed rural highway with rolling hills, about 250 feet of elevation per lap, and the event is not a closed course, so participants must run facing traffic and carry a headlamp or flasher after sunset. Aid is available at the start/finish (manned) and at the turnaround (unmanned), with Tailwind Endurance Fuel, water, snacks, and more.

On-site primitive camping is allowed; sponsors include Springfield Brewing Company Athletics and Tailwind Nutrition. Visit the organization's website for the most recent information.