I did a local 10K/5K race back in September and just checked the results online (bored at work) and noticed that all of the top finishers were under 20 or over 40 (many over 55). The 10K was dominated by masters runners and the 5K seemed to be all high school runners. I am NOT FAST at all and actually finished first in my category (30-39 Female) and now realize that there was literally no competition there as all the people with decent times were kids or people old enough to be my parents. Is this typical?