Masters Track & Field Age Graded Tables
Age graded races give extra advantages to people according to their age or sex. This uses the theory that older people or females may have more of a physical challenge than younger people or males in the same distance. There are some tables at http://free-ideas.org/~jess/mtf/agt.html Each individual race or club may create their own tables.
Age graded races-> https://www.usracecalendar.com/race-type/age-graded