there's the sussan classic. it might be called something different now but it's usually later in the year - maybe early december? i did it last year - you can do 5km or 10km & you can walk or run. it starts in st kilda & goes down beaconsfield parade. it was good fun.

or there's shorter distances with the marathon but i'm not sure if they're all geared for runners?

i'd love to join as well if you end up doing one

ETA - very happy to support most charities/causes