Collie River Ultra Marathon

Collie, Australia • 13 Sep 2025

CRU100 is a Western Australian trail race in Collie, part of the Perth Trail Series. The event offers Solo 100km, Solo 50km, and Relay 80km formats, starting near the Collie Cemetery and finishing at Collie Golf Club. Runners traverse the Wiilman Bilya Trail through jarrah, marri and yarri forests, crossing bridges and logs, with granite outcrops, river valley views, and seasonal wildflowers.

The race is fully supported with bus transfers to starts, multiple aid stations, clear course marking, and marshalled trails. It also features a friendly community vibe with a dedicated trail crew. Drop bags are available for 100km and 50km solos. Visit the organization's website for the most recent information.

Race information

101 km
2000 m+
100km Solo
76 km
1600 m+
Relay Marathon
50 km
1051 m+
50km Solo
Visit the organization's website for the most recent information.
Trail runs nearby

True Blue Ultra is an AURA-approved ultra marathon event held in Australind, Western Australia, along the scenic Leschenault Inlet at Ridley Place Foreshore Park. Scheduled for January 2026, it offers multiple race distances including 12.5 km, 25 km, 50 km, 75 km, and 100 km, with the longer distanc..