How Far is that Marathon?

I hardly expect family members or coworkers to know that the term 'marathon' applies to a race of a 26.2 mile distance only. So when grandma asks me how I did in my marathon last week and it was only a 5k I don't split hairs with her. However you'd think a race director for one of the largest 10k's in the country would know what a marathon is. I got an email from the Bolder Boulder folks offering me a free marathon training program if I signed up for their race. Turns out it's just a 10k training program for the Bolder Boulder. Hopefully noone's going to turn up for their fall marathon woefully unprepared.