I have to agree with Oak on this one. I've only run one half-marathon and I trained for 12 weeks for it---but I'm 51. My 28 year old son, on the other hand, trained for the same half-marathon and decided to do the full marathon at mile 11. The longest distance he had ever run was 16 miles. It wasn't the brightest thing he's ever done but he finished.
You want this to be fun and a positive experience and not doing the proper training may lead to injury. That wouldn't be fun
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"We don't stop playing because we grow old; we grow old because we stop playing." George Bernard Shaw
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