Collie River Ultra Marathon

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.