Perth is the most isolated major city in the world, and Western Australian running reflects it: a distinct scene, a distinct climate, and very little overlap with the eastern-states calendar. Runners here race each other rather than travelling.
Verus currently lists 257 running races in Western Australia — 11 marathons, 20 half marathons, 50 10Ks, 48 5Ks, 25 ultras and 103 at other distances — alongside 63 weekly parkruns and 15 multisport events. Those counts come from the data on this site rather than from a claim about it, and they move as the calendar does.
The dry heat, and why it matters
February in Perth averages 30.2°C — hotter than Sydney or Melbourne ever get. But January averages 1.5 rain days for the entire month and the dawn dew point is 12.6°, against 18° in Sydney and 19.9° in Brisbane. Sweat evaporates here, which is the whole mechanism of cooling.
Run the temperature-plus-dew-point rule over a January dawn and Perth lands in a 1-2% pace penalty against Brisbane's 2-3%, despite being in a hotter city. The trap is dehydration rather than heat: dry air means you do not notice how much you are sweating.
Perth
The Swan River widens into bays through the city, and a continuous shared path runs around most of them. The bridges — Causeway, Narrows, Windan, Matagarup — divide it into loops, which is how Perth runners describe distances: the city loop is about 10km, the Matagarup loop about 5km, the full Perth Water circuit past 20km.
Kings Park sits on the escarpment above the city with bushland trails and Law Walk along the edge. Jacob's Ladder, 242 steps from Mounts Bay Road to the top, is the city's stair-climb institution and the standard hill session in a city with very few hills.
West of the city, a continuous coastal path runs along the Indian Ocean beaches from Cottesloe through Scarborough to Trigg — flat, exposed, and pointed at the sunset. Perth runs west in the evening the way Sydney runs east in the morning.
The Bibbulmun Track
A 1,000km walking trail from Kalamunda in the Perth Hills to Albany on the south coast, through jarrah forest and then karri and coast. It is the spine of trail running in the west, runnable in sections, and races along it fill the calendar between autumn and spring. The Delirious WEST 200 miler runs its southern end in February.
Closer in, John Forrest National Park, Mundaring and the Kalamunda network give forest single track within an hour of the CBD.
The South West
Margaret River, three hours south, is the other centre of Western Australian endurance sport. The Cape to Cape Track gives 123km of coastal trail between two lighthouses and is raced as a multi-day event. Busselton, nearby, holds Ironman Western Australia in December — one of the flattest and fastest full-distance triathlons anywhere, with the swim alongside the Busselton Jetty.
The water
The Rottnest Channel Swim in February — 19.7km from Cottesloe Beach to Rottnest Island, as a solo, duo or team — is one of the largest open-water swims in the world and the biggest endurance event in the state. It is worth knowing about even if you have no intention of swimming it, because it shapes the local training culture.
When to run
May to October, with the caveat that this reverses the eastern pattern: July is both the coldest month and the wettest, at 15.2 rain days. Summer running is early-morning or evening only, and the Fremantle Doctor — the sea breeze that arrives most summer afternoons — can turn an unrunnable afternoon into a pleasant one.