Autumn 100^®

What is the date for 2026 and when do Entries for Open? 

Entries for the 2026 event will open Saturday 8th November 2025 at 1000. Race Date is Saturday 17th to Sunday 18th October 2026.

What do I get for my entry fee? 

Principally you get a fully supported race day experience including:

A pre-race interactive Webinar taking you through the details for the entire race

16 fully stocked aid stations.

A marked course.

Full Medical Support in the form of dedicated race ambulances and roving vehicles as well as static first aid teams and medical volunteers at aid stations.

Live Tracking every step of the way (Click here to view the tracking page & see a replay of the 2025 event).

Finish Line Hot Food and Drinks

What awards are there?

All finishers will receive a buckle. Finishers in under 24 hours will receive a '100 miles - One Day' Buckle. All finishers between 24 and 30 hours will receive a '100 mile - Finisher' buckle. 

Both the male and female overall winners will receive the Centurion trophy.

Runners who finish 5 editions of this event will receive a 500 Mile Buckle. Runners who finish 10 editions of this event will receive a 1000 mile buckle.

There are age group prizes as follows:

MV40, FV40, MV50, FV50, MV60, FV60, MV70, FV70.

Grand Slam finishers will be awarded their Slam Buckle and Finisher Tee at the finish of the event

Is there a limit to the number of entries into each distance/ Can I enter on race day?

Yes the places are limited and available on a first come first served basis - with the exception of free and guaranteed entries for our 2025 volunteers. There will be no entries on the day under any circumstances. No waiting list will be held for this event. A starting field of 250 is expected.

Is there a minimum qualification standard to achieve before I can enter?

In order to start the race, you must have completed a minimum of a 50 mile distance race within 15hrs, between 1st January 2021 and race day. As organisers, we reserve the right to refuse anybody entry who does not meet this standard. Unqualified runners may enter but should they not complete a qualifer within the requisite time frame, they will not be permitted to start. There are further conditions to what may be used as a qualifier. 

Click here to read more about what counts as a qualifier.   

Will there be live updates during the race for friends and family to follow? 

Live tracking will be available throughout the race, so that all runner positions are available at all times. The tracking page together with a live leaderboard with check point times will be published as runners in the lead up to the race.  

Are there any road crossings or gates/ stiles to negotiate? 

Yes. There are sections of the course where you will be running along single lane carriage ways or crossing busier B roads. The trail does appear at busy junctions, at some points abruptly and therefore you must be alert at all times. Runners pass along the course entirely at their own risk. Much of the course is on private land and as a result there are gates and stiles to negotiate. All gates must be closed properly after you make your way through.

How many aid stations are there?

A full aid station list is available here.

There will be 16 aid stations including the finish.

How do I get to the start/ finish?

The race start/ finish and HQ is at Goring Village Hall, High Street, Goring-on-Thames, Oxfordshire, RG8 9AG. You can find details of how to get there and away as well as details on parking under the Travel and Accom tab.  

What facilities are there at the Start/ Finish? 

Start: Toilets, Water, Indoor/ covered area, Pop-Up Centurion Running Store.
Finish: Toilets, Water, Indoor/ covered area, Hot Food and Drinks.
There are NO sleeping facilities at the start or finish. 

What time does the race start?

You must register within the times listed on the Schedule page. Your race number will not be posted to you before race day, you must collect if from registration. Start times are also on the schedule page.

Are pacers allowed?

Pacers are permitted from Mile 75. Pacers may join a runner only at Mile 75 and must cover all remaining 25 miles (Leg Four) with their runner. Pacer handovers are not permitted anywhere other than HQ at Goring. 

Are crews allowed?

Crews are not permitted at this race due to the size of the aid station locations and pressure on the local community.

Can I support/ cheer for my runner and if so, where?

The supporters tab here contains all of the information about where and when it is possible to support/ cheer for your runner. 

Where can I access my drop bag and how big can it be?

You can access drop bags each time you return to Goring at mile 25, 50, 75 and at the finish. 

The maximum size permitted for drop bags is 30 (THIRTY) litres. If your drop bag is bigger than this we will turn it away. We simply do not have space for 250 bags larger than 30 litres. 

Do I need to carry any mandatory equipment?

The majority of the course is on trail. Trail shoes are advised especially given the time of year. There are sections of trail which can become very muddy or flooded in wet conditions. 

There are many options regards kit for fulfilling these requirements and those of other events. We stock what we believe to be the best options at our online store available by clicking here under the Mandatory Gear Section. Please ask us if you have any questions.

• Fully Charged Mobile Phone including the numbers for the Race Medic and Race Director (on the number you have given at registration)
• Water Bottles/Bladder capable of carrying a minimum of 1 litre.
• Survival Blanket: 1.4m x 2m minimum
• Waterproof Jacket: Gore-tex or similar, minimum 10000mm+ & must have sealed seams. 
• Whistle
• Headtorch or Primary Light Source - Minimum 100 Lumens
• Back Up Light source - Minimum 100 Lumens 
• Warm Hat - Beanie Hat or Buff (either are accepted)
• Gloves 
• Base layer or fleece top - This must be carried separately from the start and kept dry, for use only in an emergency. Starting in 2 layers is not a substitute.
• Cup or Mug

Will there be toilets at the start/ finish or on the race route? 

There will be toilets at the start, finish and every 25 miles on course. There are also toilets at Wallingford, North Stoke, Pangbourne and Reading aid stations. At certain points the route runs close to and even right past pubs or cafes where you may be able to use the facilities but that is not a guarantee. If you need to answer a call of nature whilst on the route you must make sure you are as far off of the marked trails as you can go. 

Are there any sleeping facilities at race HQ? 

No. The hall we use for HQ is small and constantly extremely busy with the coming and going of runners and volunteers. We advise all runners to book accommodation in Goring or Streatley for the night before and after the race. Do not attempt to drive home directly from the finish without sleep.

What are the prizes/ awards?

All finishers will receive a Centurion 100 mile finishers belt buckle. Finishers in under 24 hours will receive a special '100 miles - One Day' Buckle, finishers between 24 and 28 hours will receive '100 mile Finisher' buckles. Male and Female winners will be awarded the Centurion Trophy as well as additional prizes. Those finishing the Grand Slam will be given special awards on completion of the race. 

Further Prizes will be awarded to 2nd and 3rd Placed Male and Female. Age Group Prizes will be awarded for 1st Male and Female Vet 40, 50, 60 and 70. 

What happens if I need to drop out?

If you have to drop please do so only at an aid station and preferably at Goring. Please inform the aid station captain on arrival that you intend to drop and whether you need assistance. If you drop at an aid station which is not Goring, the Aid Station Captains will inform you when it is possible to get transport back to the start point. It may be that you have to wait some considerable time so please be patient with the volunteers. 

What food and drink will there be on route?

The aid stations are well stocked with provisions suitable for all dietary requirements. Vegetarian, Vegan and Gluten Free:

• Precision Hydration Gels, Chews and Electrolyte Drink
• Tailwind
• Gu Gels
• Water
• Coke/ Pepsi
• Chocolate/ Sweets/ Biscuits
• Nuts
• Fruit
• Sandwiches and Wraps
• Savoury Snacks eg. Mini Sausage Rolls

There will be hot drinks and hot food available at every aid station from Goring Mile 25, onwards.

What level of medical support can I expect?

Medical support is of paramount importance to us as organisers. Throughout the event there will be at least one roving medical unit and a fixed medical team on hand at Goring. Individual first aiders/ medical volunteers will also be present at some aid stations. Contact numbers for the medical team will be available at registration. They will be contactable round the clock for the duration of the race. 

I need to withdraw, what is the refund/ transfer policy?

Entries for 2026 open on Saturday 8th November 2025 at 1000. Once the initial places are sold, a waiting list will be in operation.

Exceptions to this are volunteers who have earned a guaranteed free entry in advance.

You can Enter by clicking the Enter Now button on this page.

Runners may also enter the event as part of the 100 mile Grand Slam. To take part in the Slam, runners can enter each event individually, or buy a Grand Slam ticket which gets you entry to all four 100 Mile Slam events. Information on the Grand Slam, and how to enter can be found by clicking here.

Cancellation, Refund, Deferral & Transfer Policy

Runners who withdraw up to 4 weeks prior to race day (2359 GMT Friday 28 days prior) are eligible for either a refund, minus a 30% admin fee, or a deferral to 2027, minus a 15% admin fee.

Withdrawals within four weeks of race day will not be eligible for any refund and cannot be deferred. 

To defer, runners must contact us via email by clicking here. Your 2026 place will then be cancelled and any refund protection (if taken out) will be voided. You will be invited to sign up for the 2027 event, prior to general entries open. The cost due at that point is 15% of your 2026 fee plus any price difference for 2027. If you choose not to sign up at that stage or withdraw prior to race day, no refund will be issued.

To withdraw please find your entry here, login and click on my entries (if you have Xcover please see below first). You can then cancel your own entry. Your card will automatically be refunded the 70% fee up to 4 weeks before race day. This can take up to 10 working days to reach your account. Within four weeks of race day, you can still cancel your entry, but without any refund.

Exception to this is ONLY for pregnancy/ postpartum and in which case you must notify us by email here of your pregnancy no later than 4 weeks prior to race day to be eligible for a 100% refund. You must acknowledge that you understand and agree to this policy during the registration process.

REFUND PROTECTION

Refund Protection by XCover: When entering this event, you will be offered the option to purchase refund protection, provided by XCover. This allows participants to receive a full refund of their entry fees (and any extras purchased as part of a package, unless you’ve received any of these goods/services) if they are unable to attend the event due to an unforeseen circumstance (subject to T&Cs).

Centurion Running do not process, administrate, or adjudicate any claims made by or through XCover, the policy is held between the participant and XCover.

Learn more about XCover and how to process a claim on SiEntries here. Make a Claim directly to XCover by clicking here.

What happens if the event is re-routed, cancelled or abandoned?

Race management reserve the right to modify, at any time, the course or aid station locations listed. 

In the case of severe/ extreme weather conditions including but not limited to flooding after the event start, race management reserve the right to abandon the event at any time.

No refunds will be offered in that situation but a suitable alternative will always be sought. If the event cannot take place for reasons out of the control of race management including but not limited to flooding, severe weather or denial of access to the original course (foot and mouth outbreak for example), race management reserve the right to postpone the event to a later date and all entries will be carried forward to the new date. Refunds may not be offered under these circumstances. Event cancellation due to reasons such as Coronavirus or other such pandemic, public health, local authority travel and movement restrictions and bans of any kind etc. are beyond our control and no refund will be given in such circumstances. If the event is cancelled for reasons which require the event to be postponed indefinitely, race management reserve the right to retain all entry fees against costs incurred. 

Is the race an official qualifier for UTMB or Western States?

The race is a qualifier for the Western States 100 and a UTMB Index Event.

How do I get in touch on race day?

The race director and chief medic will be contactable at all times throughout race weekend on numbers given at registration and also on e mail at [email protected].

Is there any recommended reading?

The Trailblazer guides available here are excellent overall resources on the trail and include detailed maps of each section.