The January Harbour Marathon on Saturday, 14 January 2017 is from Manly to Watson's Bay in Sydney, NSW.
Fast Ferries return to Manly at 15:40, 16:40, 18:17 and 19:15. BYO hydration - there are plenty of shops, coffee at Balmoral (13kms) and beer at Kirribilli (25kms). Parking is free all day up near Manly Hospital on Darley Rd. Your race entry ($50) donated to Australian Cancer Research Foundation. There are plenty of places to DNF and ferry back to Manly if short on time.
42km (or shorter)