What are the 200m, 300m and 400m hurdle and steeplechase specifications by age group?

From the Athletics Australia able-bodied technical specifications (1 May 2025). Hurdles are 10 for 200m and 400m, and 7 for 300m.

Men's long hurdles

• Under 20: 400m or 300m, 0.914m.
• Under 18 and Under 17: 400m or 300m, 0.838m.
• Under 16, Under 15 and Under 14: 200m, 0.762m (18.29m to the first hurdle and between hurdles).

Women's long hurdles

• Under 20, Under 18 and Under 17: 400m or 300m, 0.762m.
• Under 16, Under 15 and Under 14: 200m, 0.762m.

Steeplechase barrier height

• Men: Under 20 3000m at 0.914m; Under 18 and Under 17 2000m at 0.838m; Under 16 and Under 15 2000m at 0.762m; no event for Under 14.
• Women: Under 20 3000m at 0.762m; Under 18 to Under 15 2000m at 0.762m; no event for Under 14.

Source: https://www.athletics.com.au/wp-content/uploads/2024/12/AA-Technical-Specifications-2025-05.pdf