An annual hiking challenge is back this October, encouraging people to get outside and enjoy the fall colors along the Ice Age National Scenic Trail in Wisconsin.

The Ice Age Trail Alliance 's Mammoth Hike Challenge encourages people to hike, walk, run, backpack — or even saunter or skip, the alliance's website says — 45 miles of the Ice Age National Scenic Trail and visit three Ice Age Trail communities during October.

The Ice Age National Scenic Trail spans around 1,200 miles in Wisconsin, passing through multiple state and federal lands. It's primarily for off-road hiking and backpacking, and showcases landscape features formed by Wisconsin's last continental glacier. The path goes through or borders 26 official "trail communities," which the alliance describes as part of a "s

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