GPT100 Miler
Gariwerd/Grampians national Park
Enter as Solo or a Pair (Team of Two)
Start: MOUNt Zero, 8:00AM, November 7, 2025
Distance: 162km
Elevation Gain: 7700m+-
Course: the entire Grampians Peaks Trail
Cut off: 10:00Am Sunday, Dunkeld (50 Hours)
Event village & STAY: HALLS GAP
Prize Money: TBA for 2025
GPT100 Miler is a WORLD TRAIL MAJOR and also the AUTRA Australian 100 Mile Championships in 2025
The ultimate 100 mile journey, traversing the entirety of the Grampians mountain range from Mt Zero in the north to Dunkeld in the south.
The challenge will entail climbing and descending 7700m through a combination of sandstone slabs, gradual smooth trail, stairs and technical rocky outcrops. It is an incredibly challenging trail that will test the mind and body.
The route follows the full spine of the range along 99% single hiking trail and so the views throughout the journey will outweigh the physical toll and inspire you well beyond the finish.
The
course description
Along the way runners will pass 12 campsites each with stunning huts built in the most secluded areas along the route. There will be 11 aid stations to assist the runners at road crossings, trails heads, Halls Gap and public campgrounds.
Much of the journey goes through remote wilderness areas, where the rocky trail is a welcomed source of safety. There is a real sense of connection to nature and place. The race will be broken up into four sections each with major aid stations at each completion.
The first leg to Halls Gap starts with the iconic climb up the rock slab to reveal the entirety of the world famous Taipan Wall. After running under the rock wall the trail finds its groove as it toggles between a thin rocky uneven surface and a smooth dirt ribbon. There are numerous waterfalls through here, with continual 360 views of the entire Grampians grandeur, which is a common theme throughout the whole run.
The second section through to Duwul/Mt William has continual long climbs. It may be nightfall for the majority of the field heading up to the famous Pinnacles Lookout or Mount Rosea. This section is draining with foot placement and ankle stability being the key. Conserve energy when possible. Take time at Borough Huts to compose yourself and fuel and hydrate. The next 34km to Jimmy Creek are the crux of the race. There is much technical trail, especially up to, and across the Seven Dials and Redmans Bluff. However, the trail improves from here and the views from the top are spectacular as the trail adheres to a clifftop along to Mt William Aid Station.
The next section through to Griffin Fireline is a net downhill. Except for the speedy runners it will be well into the daylight of Saturday for the bulk of the field to navigate this difficult stretch in the day. It starts with a very challenging 19k which crosses the Major Mitchell Plateau up to the high point of the race, Durd Durd at 1167m asl. A very long and initially steep descent brings you to Jimmy Creek where the runners will be rewarded for having done the hardest sections of the race. Many short punchy climbs and flowy downs follow. There is a lot of newly built trail, and it is much appreciated. It will be hard to find rhythm through these shorter continual hills, with some rock hopping, choppy climbs mixed in with fast terrain.
The final section passes over some of the well-known peaks in the southern section of the range. This means lots of steep ascent, often on stairs to some striking summits including Mud-Dadjug/Mt Abrupt, and Wurgarri/Mt Sturgeon. Despite being a brutal end, people will have a sense of the journey’s end, which may bring joy but also sadness that the adventure must come to an end. Runners take an enjoyable river trail to the town centre, where the party celebration awaits!
GPT100 Miler Pairs
This new format in 2025 will give participants the chance to register to run the entire 100 Mile Course as a team of two. You will share the entire trail without leaving the other runner’s side. This will be governed by a disqualification from the Pairs Race if you arrive at an aid station more than 5 minutes apart.
There will be a Winning Pairs team for each of the following categories:
Mixed Pair
Female Pair
Male Pair
The impact of this event will be to encourage a shared journey through the landscape. Overcome the challenges of working together and keeping spirits high on this incredibly challenging route. Runners will have the added benefit of having company through the night and extra safety of travelling in twos.
This format increases the safety of the event and hopefully encourages those who have apprehensions towards the Miler to give it a go and conquer the route with someone who they can count on. It will also give those who sign up a training buddy for 2025!
COurse MAP
Details
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Wednesday November 5, 2025
2:00 PM - Opening Smoking Ceremony
2:30 PM - Event Village Opens At Centenary Hall in Halls Gap
Thursday November 6, 2025
2:30 PM - 5:00 PM - Mandatory Gear Check and Bib collection for GPT100 Miler & Team Relay
2:30 PM - 5:00 PM - Shoe wash station open for all runner’s and crew’s shoes to be worn on the GPT trail
2:30 PM - 5:00 PM - Drop Bag service open at Event Village for Miler
5:00 PM - Elite Panel
5:30 PM - Race Briefing for GPT100 Miler & Team Relay
Friday November 7, 2024
5:00 AM - 6:00 AM - Drop Bag service open at Event Village for Miler
6:00 AM - Rolling Shuttle departure to Mt Zero
6:30 AM - 7:30 AM - Tracker Allocation at Mt Zero and Shoe Wash for Miler
8:00 AM - START GPT100 Miler & Team Relay
8:30 AM - Crew and supporters shuttle leaves Mt Zero to Halls Gap
1:45 PM - 8:00 PM - GPT100 Miler & Team Relay runners running through Halls Gap Aid Station
Saturday November 8, 2025
6:00 AM- 8:00 AM - Anticipated First Finisher GPT100 Miler in Dunkeld
12:00 PM - 12:00 AM - Large portion of the GPT100 Miler field finishing in Dunkeld
Sunday November 9, 2025
10:00 AM - Cut-off for GPT100 Miler
7:00 PM - Prize Presentations for GPT100 Miler, Stage Race and Team Relays at Halls Gap Event Village
8:00 PM - Large Finishers Photo under the arch at Halls Gap
8:00 PM - Event Village closes and GPT100 2024 Concludes!
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EVIDENCE FOR QUALIFICATION
Official trail running race result of 100km or more OR finished the GPT50k or one of the "Qualifiers" listed down the page, within the 2-year period November 1, 2023 and October 31, 2025.Condition that the 100k trail race in NOT a “Last Person Standing” format. This is due to the fact that they are held in such controlled conditions with regular breaks and frequent crew stops. We want people to have completed a somewhat remote, technical trail race that prepares people for the GPT100 course, and we don't believe the "last person standing" format is sufficient for this.
PROPOSAL FOR QUALIFICATION
This is required only when ‘evidence-based qualification’ is unable to be provided by the athlete.Proposal for consideration must be able to demonstrate capability and fitness. Compulsory is a link to your Strava profile or similar.
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All Runners including Pacers Must bring their mandatory Gear to the bib collection at Centenary Hall to have it checked.
THE MILER WILL BE CHECKED 4 TIMES ON COURSE FOR ONE ITEM AT A TIME. YOU WILL BE PENALISED 30 MINUTES FOR ONE MISSING ITEM OR DISQUALIFIED FOR MISSING A SECOND ITEM.
The mandatory gear list to be carried at all times throughout the race is as follows:
A quality pack suitable to carry all the below items
Waterproof Jacket with hood. Must be made with a waterproof and breathable membrane. The hood must be attached to the jacket by the original manufactured design and must be seam sealed. Must be suitable for protection in bad weather in the Mountains.
Thermal long sleeve top weighing at least 180g (for Men’s medium) made of polypropylene or wool textile only.
Warm headwear (beanie, buff or balaclava)
Sun Hat or Visor (neck cover recommended if hot)
Warm full fingered Gloves
Fully charged Smart Phone that is switched on. It is highly recommended you carry a power bank or have a system to charge your phone at aid stations. Turn off Bluetooth, wifi, and close all apps. If you listen to music, do it through an ipod or you must carry a power bank to charge the phone.
Telstra SIM * (see mandatory gear page for more details)
3L Litres of liquid storage capacity
Collapsible cup 150ml (recommended, this is a cup free event)
Two (2) working torches each with spare batteries for each. One of the spare batteries can include a separate power bank to charge a head torch.
Survival / Emergency Blanket
Snake Bite Bandage with indicators (not less than 10cm x 2m). We recommend SMART bandage (LINK HERE with valuable information on snake bites as well)
500 kcal of Emergency Food (equivalent to 2 food bars)
Waterproof Pants (weather dependant, TBA prior to the race via Text and email)
Thermal long pants (polypropylene or wool textile only) (weather dependant, TBA prior to the race via Text and email)
Fleece/Second Warm Layer (recommended if cold forecast, not mandatory)
Ice Bandana / Neck Cooler (recommended if over 23C). There will be ice, at key points on course to cool runners heading into hot sections. The T8 neck coolers are very easy to use and cover the neck perfectly.
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GAR Trailhead
Crew Access: There is parking available for crew who wish to drive (34 min from Halls Gap)
Stocked with water, Pure Electrolyte Drink, Pure Fluid Energy Gels, coca-cola, ginger beer, fruit, lollies, chocolate, chips, boiled potatoes.
Mt Difficult Rd
NO CREW ACCESS: This aid station is located on the side of a narrow dirt road. There will be no parking for crew or supporters.
Stocked with water, Pure Electrolyte Drink, coca-cola, ginger beer, fruit, lollies, chocolate, chips, hot soup, noodles, boiled potatoes.
Halls Gap
Crew Access: Full Access to crew and Supporters with ample Parking
Stocked with water, Pure Electrolyte Drink, Pure Fluid Energy Gels, coca-cola, ginger beer, fruit, lollies, chocolate, chips, hot soup, noodles, boiled potatoes. Plus toasties tomato and cheese (vegan option).
Halls Gap will have limited beds ready for athletes who choose to have a power nap.
Rosea Carpark
Crew Access: Full Access to crew and Supporters (12 mins from Halls Gap)
Stocked with water, Pure Electrolyte Drink, Pure Fluid Energy Gels, coca-cola, ginger beer, fruit, lollies, chocolate, chips, hot soup, noodles, boiled potatoes.
Borough Huts
Crew Access: Full Access to crew and Supporters (10 mins from Halls Gap)
Stocked with water, Pure Electrolyte Drink, Pure Fluid Energy Gels, coca-cola, ginger beer, fruit, lollies, chocolate, chips, hot soup, noodles, boiled potatoes.
Borough Huts will have tents ready for athletes who choose to have a power nap.
Mt William Carpark
Crew Access: Full Access to crew and Supporters (25 mins from Halls Gap)
Stocked with water, Pure Electrolyte Drink, Pure Fluid Energy Gels, coca-cola, ginger beer, fruit, lollies, chocolate, chips, hot soup, noodles, boiled potatoes. Plus toasties with tomato and cheese (vegan option).
Mt William will have limited beds ready for athletes who choose to have a power nap.
Jimmy Creek Rd
Crew Access: Full Access to crew and Supporters (22 mins from Halls gap)
Stocked with water, Pure Electrolyte Drink, Pure Fluid Energy Gels, coca-cola, ginger beer, fruit, lollies, chocolate, chips, hot soup, noodles, boiled potatoes.
Yarram Gap Rd
NO CREW ACCESS
Stocked with water, Pure Electrolyte Drink, Pure Fluid Energy Gels, coca-cola, ginger beer, fruit, lollies, chocolate, chips, hot soup, noodles, boiled potatoes.
Griffin Fireline
NO CREW ACCESS
Stocked with water, Pure Electrolyte Drink, Pure Fluid Energy Gels, coca-cola, ginger beer, fruit, lollies, chocolate, chips, hot soup, noodles, boiled potatoes. Plus toasties with tomato and cheese (vegan option).
Griffin Fireline will have limited beds ready for athletes who choose to have a power nap.
Cassidys Gap
Crew Access: Full Access to crew and Supporters (41 mins from Halls gap)
Stocked with water, Pure Electrolyte Drink, Pure Fluid Energy Gels, coca-cola, ginger beer, fruit, lollies, chocolate, chips, hot soup, noodles, boiled potatoes.
Bainggug Carpark
Crew Access: Full Access to crew and Supporters (43 mins from Halls gap)
Stocked with water, Pure Electrolyte Drink, Pure Fluid Energy Gels, coca-cola, ginger beer, fruit, lollies, chocolate, chips, hot soup, noodles, boiled potatoes.
FINISH - Dunkeld
Crew Access: Full Access to crew and Supporters (46 mins from Halls gap)
Stocked with water, Pure Electrolyte Drink, coca-cola, ginger beer, fruit, lollies, chocolate, chips, hot soup, noodles, boiled potatoes.
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Aid Station: Cumulative Distance, Leg Distance, Ascent, Descent
START Mt Zero Picnic Area
GAR Trailhead: 15.5km, 15.5km, 620m+-
Mt Difficult: 35.5km, 20km, 1100m+, 670m-
Halls Gap: 49.5km, 14km, 300m+ ,770m-
Rosea Carpark: 59km, 9.5km, 650m+, 270m-
Borough Huts Camp: 72km, 13km, 440m+, 745m-
Mt William Carpark: 87km, 15km, 1260m+, 610m-
Jimmy Creek: 106km, 19km, 775m+, 1400m-
Yarram Gap: 117km, 11km, 580m+, 560m-
Griffin Fireline: 129km, 12km, 440m+, 490m-
Cassidys Gap: 140.5km 11.5km, 450m+, 370m-
Bainggug Carpark: 151.5km, 11km, 650m+, 730m-
FINISH Dunkeld: 162km, 10.5km, 455m+, 485m-
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TOTAL: 50 HOURS
FRIDAY November 7, 2024
- START Mt Zero Picnic Area: 8:00 AM
- GAR Trailhead: 12:00 PM
- Mt Difficult Rd: 5:00 PM
- Halls Gap: 8:00 PM
- Rosea Carpark: 11:00 PM
SATURDAY
- Borough Huts Camp: 2:15 AM
- Mt William Carpark: 8:15 AM
- Jimmy Creek: 2:30 PM
- Yarram Gap: 6:30 PM
- Griffin Fireline: 10:15 PM
SUNDAY
- Cassidys Gap: 2:00 AM
- Bainggug Carpark: 6:30 AM
- FINISH Dunkeld: 10:00 AM
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Runners in the GPT 100 Miler may have pacers accompany them on course from Borough Huts Campground (72km) to the finish. Runners may have different, the same, or no pacers for each of the following pacing legs. Note, the maximum Pacing Legs ONE pacer can do is TWO Legs, ie. one person cannot pace all three legs.
There are three 'Pacing Legs':
LEG 1: Borough Huts (72km) to Jimmy Creek Rd (106km) {34km, 2035m+, 2010m-}
LEG 2: Jimmy Creek Rd (106km) to Cassidys Gap (140.5km) {34.5km, 1470m+, 1420m-}
LEG 3: Cassidys Gap (140.5km) to Finish (162km) {21.5km, 1105m+, 1215m-}
Prices
Each pacer is required to register and pay an entry fee (the runner that is racing can do this for their pacers by registering for them in Race Roster). This will cover insurance and aid station supply. This can be paid through the online registration. All Pacer’s details must be accurate in the system by 17 November!
LEG 1: $30 p/pacer
LEG 2: $30 p/pacer
LEG 3: $30 p/pacer
Pacer Rules:
Pacers for the Miler runners must be registered in Race Roster for the correct leg/legs that they will be running by 17 November. This is important so that we have the details and medical background for everyone out on course and we know who exactly is running and when.
A Pacer can only pace up to 2 legs. We do not want the added risk of having a pacer essentially running an incredibly hard Ultra on the back half of the course. We have included Pacers in the race to increase safety for our runners, especially through the night.
Pacers must carry the same mandatory gear required by the 100-mile runners.
Except for a medical emergency, Pacers are not allowed to carry any gear, food or drink for their Miler runner to use or consume. They are only there to help with navigation, safety and encouragement.
Pacers can only join their Runners at the designated aid station for each pacing leg start.
A runner can only ever be accompanied by ONE Pacer on a Leg. Pacers are intended to increase the safety of our event by having someone to navigate and assist a runner mentally to avoid poor choices with nutrition, hydration and cliff danger. Having more than one Pacer would simply add to the overall risk of our event by adding more people to our duty of care and potentially more humans that could need assistance from our medical team.
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An “Aid Station Drop Bag” service will be managed by a team of volunteers from the Event Village in Halls Gap.
The Aid Stations where these Drop Bags will be made available will be via the Major Aid Stations of Halls Gap, Mt William Carpark, Griffin Fireline, and the Finish in Dunkeld.
Athletes are requested to provide all gear in their own labelled, insulated, zipped “Woolworths-type” bag where practical. Please clearly identify it with your bib number and the appropriate Aid Station (as above).
Drop Bags will be able to be dropped in Halls Gap Event Village between 2:30 PM and 5:00 PM Thursday and 8:00 AM and 10:00 AMFriday.
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Shuttle Buses will be available for runners to the start line in Mt Zero. Runners MUST BOOK on Race Roster if they require a seat for Friday.
Miler runners will be able to book these for free. Spectators who want to book can do so for $30. Booking open until sold out!
Head to the Race Roster Store now to reserve your seat
GPT100 Miler will also have shuttles provided to bring them back to Halls Gap from the finish line at Dunkeld. These will be rolling shuttles running the entire finishing window. These do not have to be booked.
More information on the shuttle times can be found in the Event Schedule
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Race Entry
GST and registration platform fees
Shuttle from Halls Gap to Start line on Friday and from Dunkeld Finish line to Halls Gap
Professional on-course sports photography available for purchase
Coveted 100 Mile Buckle
Fully marked course
Expert event medical support
On-course nutrition and refreshments
Drop Bag Service
Professional event timing
Live real-time results via on-course checkpoints
GPS Trackers for all runners, which will see greater safety for runners out on course and also greatly improve the crewing experience to estimate when runners will arrive.
The GPT100 Miler is a World Trail Major
World Trail Majors was born with the purpose of uniting historic races due to their philosophy of caring for the environment, their historical heritage and their natural beauty. They are a collection of “bucket list” races for both amateur and professional runners who want to experience racing like it should be. Each time a unique experience.
The GPT100 Miler is registered with the International Trail Running Association (ITRA).
All runners who complete the course will gain qualifier points for their ITRA Performance Index.
The GPT100 Miler is a UTMB® World Series Qualifier Event.
All runners who complete the course gain qualifier points for their UTMB® Index.
Runners with a valid UTMB® Index will have privileged access to register for a UTMB® World Series Event or UTMB® World Series Major and will use their UTMB® Index to validate their entry into the UTMB® World Series Finals lottery.
The GPT100 Miler is the 100 Mile Australian Championship in 2025
Athletes battle it out for the title of National Champion and see who will rise to the top of this iconic trail running challenge.
For further information, please refer to the AUTRA Website