(San Francisco Chronicle)-- Lisa Hallett runs away her grief.

She runs to pound down the pain left from when her husband, Army Capt. John Hallett, died in an explosion in Afghanistan nearly two years ago. She runs to help heal other military widows. She runs to keep herself healthy, so she can be the best mom she can be for her three small children.

So far, the most she has ever run, at age 30, is 32 miles. But this coming Sunday, Hallett will bring her grief and her healing and her growing crowd of running comrades to San Francisco to try something she has never tried before.

Hallett will attempt an ultra-marathon, or 52.4 miles, as she runs in the annual San Francisco Marathon. She says 26.2 miles has just become too easy for her - and easy alone doesn't properly honor her hero husband.

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