For those not familiar with Age-Grading:
74-79% Age Performance....REGIONAL CLASS (an 'age-grouper'; i.e., will typically Podium one's age-group at the local 5k).
80-89% Age Performance....NATIONAL CLASS.
>90% Age Performance........INTERNATIONAL CLASS.
The table below lists the times required for MALES to break into the NATIONAL CLASS standard, at various distances.
Male NATIONAL CLASS Times
AGE….Mile….…5k……….10k…….Half-Mar…..Marathon
20……4:44…..16:04…....33:00……1:12:31…….2:32:04
25……..”………..”………...”…….........”………….....” ...
30……..”………..”………...”…….........”………….....” ...
35……4:48.6…16:19…..33:19…..1:12:55………2:32:54
40……4:58.6…16:55…..34:15…..1:14:48………2:36:50
45……5:09.9…17:34…..35:38…..1:17:54………2:43:19
50……5:22.0…18:16…..37:09…..1:21:18………2:50:26
55……5:35.1….19:01….38:46…..1:24:59……...2:58:13
60……5:49.4…19:50…..40:34…..1:29:03……...3:06:43
65……6:04.8…20:44…..42:31…..1:33:31……...3:16:05
70……6:23.1….21:48….44:41…..1:38:28……...3:26:26
75……6:51.6….23:26….47:38…..1:45:14……...3:40:36
80……7:35.0…25:56…..52:23…..1:56:05……...4:03:30
85……8:44.5…29:50…..59:55…..2:13:04……...4:40:28