Horsham, VIC, Australia · Thursday, November 5, 2026

Fixed Distance 100 mi

Grampians Peak Trail 100mi (GPT100)

36 days away
161 km Distance
7,510 m Climbing
10.0 Grit · Elite / extreme
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36.7113° S, 142.1998° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 47 m / km Mountain. Significant climbing. Steep sections will require power hiking.
Time limit 53 hours 19:45 min/km average. Generous. Walkable throughout for most of the field. Among the most forgiving 100 mi cut-offs we track. Measured against 30 races of the same distance. Cut-off calculator →
Field size ~100 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2025 edition (100mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, November

Daytime high 27°C
Night low 10°C
Rainfall Mostly dry
Daylight 13 h 44 m of light

Regional 2001-2020 average for November — NASA POWER, grid elevation 133 m. Not a forecast.

Results history

Year Race Finishers Men's winner Women's winner
2025 100mi 100 Caleb Olson · 21:19:39 Man-Yee Cheung · 27:58:45
2023 100mi 61 Michael Dunstan · 24:01:33 Kellie Emmerson · 28:18:57

The field grew 64% between 2023 (61) and 2025 (100). 17% of the 2025 field were women.

DUV results for the 2025 edition (100mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a mountain course. Poles are highly recommended for the sustained climbs.

By UltraHub Expert
👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert
🥤 nutrition

For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

By UltraHub Expert

Gear for this race

Chosen for 161 km of trail with 7,510 m of ascent.

  • Trail Running Shoes 47 m of climb per kilometre — grip and rock protection before cushioning.
  • Race Nutrition Past 161 km the palate quits before the legs do — carry more than one flavour.
  • Hydration Vests Pole attachment and chest-strap stability on steep ground.
  • Trekking Poles 7,510 m of ascent to walk up.
  • Headlamps A 53 h limit puts you out there after dark.

Salomon

Ultra Glide 4

$159.95 ★★★★★ 4.6

Salomon

Aero Glide 4 Grvl

$159.95 ★★★★★ 4.5

Spring Energy

Awesome Sauce

Real food gel with 180 calories. Rice-based with natural flavors.

$4 ★★★★★ 4.6

Nathan

VaporKrar 12L

12L race vest co-designed with ultra champion Rob Krar, with insulated bladder pocket.

$170 ★★★★★ 4.6

Black Diamond

Distance FLZ

Lightweight folding trekking poles with FlickLock Z adjustment. 340g per pole.

$170 ★★★★★ 4.7

Petzl

NAO RL

1500-lumen reactive lighting headlamp with 15-hour runtime. Automatic brightness adjustment.

$150 ★★★★★ 4.7
All gear guides →

Overview

The Grampians Peak Trail 100mi (GPT100) is a 161 km trail race with 7510 meters of elevation gain, taking place in Horsham, VIC, Australia. Its 46.6 meters of climb per kilometer makes it a challenging route for its distance. The 53-hour time limit imposes a cutoff pace of 19.8 minutes per kilometer, making it tighter than 3% of 100-mile races.

With 100 finishers in its latest 2025 edition, GPT100 has a larger field than 90% of its 71 peer 100-mile races. The race covers the 100 miles of the Grampians Peaks Trail, running from Mt Zero in the north to Dunkeld in the south. The next edition is scheduled for November 5, 2026.

Similar races

Other 100 mi trail ultras, closest in distance first.