These are the age brackets that each runner can race within to compete with those in a similar age group. 2025 will see the introduction of Age Group Winner Prizes for the Twilight 10k, Sky Run 20k, Buffalo Stampede 100k, Sky Marathon 42k, Ultra Slam, Grand Slam. Ages will be calculated by the runners age on the day of the Race.

Youth: 0 - 23

Open: 24 - 39

Masters: 40 - 49

50 - 59: 50 - 59

60 - 69: 60 - 69

Legends: 70 +

2k Junior Trail Run Age Groups

Under 6: 0 - 5

Under 8: 6 - 7

Under 10: 8 - 9

Under 14: 10 - 13

5k Family Trail Run Age Groups

Under 13: 0 - 12

Under 15: 13 - 15

Under 17: 15 - 16

Open: 17 +