Grampians Peaks Trail 100 Miler
Halls Gap, Australia • 5-8 Nov 2026
Event overview
The Grampians Peaks Trail 100 Miler (GPT100) is a trail running event held on the Grampians Peaks Trail in Gariwerd, Grampians National Park. The full trail measures 162 km with approximately 7,700 m of elevation gain, running from Mt Zero in the north to Dunkeld in the south. Halls Gap is the event basecamp and headquarters; it is about 260 km northwest of Melbourne by road. The event is staged in November, with editions mentioned for 2025 and 2026. The GPT100 is included in the World Trail Majors series from 2025 onward.
Race formats and course details
Race options cover several formats:
- 162 km - GPT100 Miler (solo or pairs)
- 100 miles - GPT100 Stage Race over four days
- 100 miles - GPT100 Miler Team Relay (teams of four)
- 100 miles - GPT100 Stage Race Team Relay (teams of three)
- 50 km - GPT50K (Mount Zero to Halls Gap)
- 2 km and 5 km - Dunkeld junior and family trail races
The course is divided into four sections, each served by major aid stations. Much of the route passes through remote wilderness and follows rocky trail surfaces. The event notes the presence of aid stations, cut-offs, and mandatory gear requirements. Finishers of the 2025 GPT100 Miler (solo or pairs) are eligible to enter the Hardrock 100 lottery for 2026 and 2027; moving forward the miler will be a qualifying race that grants finishers two years of Hardrock lottery eligibility. Visit the organization's website for the most recent information.