CHICAGO — Running 135 miles straight without sleep in minus-40 degree temperatures — while pulling a 30-pound sled filled with supplies — might be the craziest athletic competition ever created.

But that's exactly what Bronzeville's Scott Kummer is attempting to finish starting Monday in the three-day Arrowhead 135 — which begins in International Falls, Minn., and concludes in Tower, Minn.'s Fortune Bay Casino.

In between is a 135-mile snowmobile trail that about 160 competitors can either run, cross-country ski or bike through as they haul their sleds.

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