Welcome to aat kids.

As organisers of some of the UK’s largest (and best) running and multi-sport events for children, we assure you that your children will have a fun and safe experience with aat events.

Children are welcomed to cheer their parents at all of our events, and invited to take part in many of the races we organise. Please refer to the age restrictions below to determine whether or not your child is old enough to participate in an event.


Age Restrictions

For insurance purposes – and to ensure that children exercise within their means and have an enjoyable experience – we work to the following age restrictions:

6 yrs. +   |  Can participate in events up to and including 1km

10 yrs. +   |  Can participate in events up to and including 5km

13 yrs. +   |  Can participate in events up to and including 10km

16 yrs. +   |  Can participate in events up to and including 21km

18 yrs. +   |  Can participate in any event including those of 21km or longer.


Please note, all children aged 10 years or younger should be accompanied by an adult throughout the course no matter the distance of the event they are participating in.

Our road running events are UKA affiliated. The UKA rules state that children must be 17 or older to participate in 21km events, and 11 to participate in 5km events.


We recommend the following events for kids:

November – Chessington Running Wild. 2km Kids’ Challenge, 5km and 10km tarmac running races.

March – Mercer Surrey Half Marathon. 2km Kids’ Race and 5km closed road run. 21km run for those aged 17 or older.

June – Breakfast Run at Loseley. 2km Kids’ Run on gravel/grass, 11.4km road run.

July – Guildford Triathlon. Aquathlon races with 3 race distances for those aged 8-15 years. Sprint triathlon for those aged 15 and older.