14.5 At all National format events outdoors, tracks will be a minimum of 3 metres wide and minimum 130 metres in length.
14.6 At Sanctioned events, other than Nationals, tracks must be a minimum of 2.4 metres wide.
14.7 The straight for starting finals, will be a minimum of 20 metres long, with no obstructions, including any form of jump, sudden rise or fall.
So if you aren't ever going to run a national on it go 2.5m and even if a hose gets moved a bit your still going to be good.
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