Article: 'Mapman and Robin': Couple stay in shape with arduous treks

KAREN HERTLEIN says she doesn't know how old she is. She hasn't kept track since middle school.

"My grandma never did, and I don't either. She said it's a good way to remain ageless and not worry about where you are in life," Hertlein said.

Her husband, Jim Hertlein, has adopted this philosophy, too.

Presumably, agelessness helps when tackling feats of endurance. But for the record, she's 47, he's 57.

In 2006, the couple from Kirkwood, Mo., gave themselves the trail names Mapman and Robin, strapped on 30-pound backpacks and hiked all 2,175 miles of the Appalachian Trail from the peak of Springer Mountain in Georgia to the peak of Mount Katahdin in Maine.

Two years later, the duo hit the ...

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