This live feed is in Perth for the marathon:
Perth Marathon live
The event starts and finishes at the WAMC Headquarters at the Burswood Water Sports Centre with a very picturesque course following the river on the shared paths through East Perth, South Perth, along the Freeway path to Canning Bridge, then following the riverside paths to Troy Park in Applecross and then returns.
The Swan River estuary flows through the city of Perth, in the south west of Western Australia. Its lower reaches are relatively wide and deep, with few constrictions, while the upper reaches are usually quite narrow and shallow. The Swan River drains the Avon and coastal plain catchments, which have a total area of about 121,000 km2. It has three major tributaries, the Avon River, Canning River and Helena River. The latter two have dams (Canning Dam and Mundaring Weir) which provide a sizeable part of the potable water requirements for Perth and the regions surrounding. The Avon River contributes the majority of the freshwater flow. The climate of the catchment is Mediterranean, with mild wet winters, hot dry summers, and the associated highly seasonal rainfall and flow regime.
The Avon rises near Yealering, 100 km southeast of Perth: it meanders north-northwest to Toodyay about 90 km northeast of Perth, then turns southwest in Walyunga National Park - at the confluence of the Wooroloo Brook, it becomes the Swan River. The Canning River rises not far from North Bannister, 100 km southeast of Perth and joins the Swan at Applecross, opening into Melville Water. The river then narrows into Blackwall Reach, a narrow and deep stretch leading the river through Fremantle Harbour to the sea.