I measured it out last week and lo and behold it's almost exactly the same circumference distance-wise as North Hagley Park! Which means three laps and you've got yourself a 10.5km run - quarter of a marathon. Bam. Awesome.
And the scenery is great too, loads of birds, nice trees, the marshland in the middle with some pretty ponds and the board walk is cool too. The tracks a hard packed gravel and of course it's all away from the surrounding roads which means no crossings, or driveways to look out for. That probably doesn't phase you much, but as an event organiser these are all major plusses! You could do this run with a pram if you're so inclined. Anyhoo, I'll put this event on a couple weeks before the Quickie on the Beach, as a little teaser and for a starter goal for those who are interested. Hope you're well!