For parents of junior triathletes aged 7 to 17 racing AusTriathlon (Triathlon Australia) sanctioned events in 2026/27. Covers maximum distances by age, age cut-off, bike and helmet rules, drafting, wetsuits, penalties and what parents can do on course, from the June 2026 Race Competition Rules.
These are the maximum distances for each leg. Events can use any configuration within these maximums, and no single leg may exceed the listed distance even if the other legs are shorter.
| Age | Swim | Bike | Run |
|---|---|---|---|
| Under 7 | 100 m | 1 km | 500 m |
| 7, 8, 9 | 100 m | 3 km | 1 km |
| 10, 11 | 200 m | 6 km | 2 km |
| 12 | 500 m | 13 km |
| 4 km |
| 13 | 500 m | 15 km | 5 km |
| 14 | 1000 m | 20 km | 7.5 km |
| 15, 16 | 1500 m | 40 km | 10 km |
| 17 | 1500 m | 40 km | 15 km |
| 18 and over | No limit | No limit | No limit |
Separate maximum tables exist for junior duathlon (run/bike/run) and aquathlon (run/swim/run). For a relay, each leg has its own limits; for example a 12 year old relay leg can be up to 750 m / 15 km / 4 km.
Source: AusTriathlon Race Competition Rules, June 2026, Appendix E, Table 1.
https://www.triathlon.org.au/austriathlon_race-competition-rules_2026_jun2026_web/
Source: AusTriathlon Race Competition Rules, June 2026, Appendices C, D and E.
Helmet (all ages): compulsory and approved by a testing authority recognised by a national federation affiliated with World Triathlon. No alterations or additions, including to the chin strap, and no omitted parts. It must be securely fastened from the moment the bike is taken off the rack until it is racked again after the bike leg; the buckle cannot be locked or unlocked in that time.
Extra equipment rules for competitors aged up to and including 13 in age-group categories:
All ages: an operational brake on each wheel, handlebar ends plugged, no fixed-gear bikes, and a bike no more than 1.85 m long.
Source: AusTriathlon Race Competition Rules, June 2026, rules 3.3 to 3.5, 3.12 and 3.13.
It depends on the event type.
Non-drafting events (rules 3.7 to 3.13):
Draft-legal events: these rules cover Elite, Under 23, Junior and Youth competitors and AusTriathlon approved teams. The World Triathlon Competition Rules apply, with only traditional plugged drop handlebars, no clip-on bars and no disc wheels. WT Youth is for competitors turning 14 and 15 in the World Triathlon competition year who are endorsed by their state or territory triathlon association to compete in draft-legal triathlon (WT Junior is for those turning 16 to 19).
For age-group juniors in a draft-legal event, wheels must have at least 12 spokes, disc wheels are not permitted, only plugged traditional drop handlebars are allowed and clip-on bars are not permitted.
Source: AusTriathlon Race Competition Rules, June 2026, rules 3.7 to 3.11, 3.14, 3.15 and Appendix D.
For age-group competition (which includes the Under 19 category), outside World Qualifying races, a wetsuit is forbidden at a water temperature of 24.6 C and above and mandatory at 15.9 C and below, for all distances.
WT Junior and WT Youth (draft-legal pathway) competitors fall under a separate rule: for swims up to 1500 m a wetsuit is forbidden at 20.0 C and above, and for swims of 1501 m and longer at 22.0 C and above. It is mandatory at 15.9 C and below.
Other wetsuit rules:
Source: AusTriathlon Race Competition Rules, June 2026, rules 2.1, 2.5, 2.6, 2.8 and Appendix A.
Source: AusTriathlon Race Competition Rules, June 2026, rule 11 and Appendix B.
Source: AusTriathlon Race Competition Rules, June 2026, rules 1.3, 1.4 and 4.4, Appendix B.
Source: AusTriathlon Race Competition Rules, June 2026, rules 1.1(p), 2.7, 3.6, 4.2, 4.3, 5.1 to 5.7.