2026 Tracking & Results
The listed edition is scheduled for Oct 17-18, 2026. Tracking may not show current positions until the race starts. Live positions are not final results. Published outcomes will be recorded here once a result source is available.
Event Overview
| Date | Oct 17-18, 2026 |
|---|---|
| Location | Goring-on-Thames, England, UK |
| Format | Fixed-Distance |
| Terrain | Trail |
| Region | Europe |
| Distance / duration | 100 mi |
| Course model | Out-and-back |
| Edition note | Race full. Entries sold out on June 21, 2026, and on October 12 the organizer's entry page said the waiting list was also full, with no further way to enter. Withdrawals within four weeks of race day get no refund or deferral. Centurion's "Live" link points to Open Tracking for the 2026 race. |
| Elevation gain | 5,000 ft (1,500 m) |
| Cutoff | 28 hours (1:00 PM Sunday), with cutoffs at every aid station |
| Start | 9:00 AM Saturday |
| Field size | Centurion expects about 250 starters. The entrant list showed 280 names on October 12. |
| Sanctioning | UK Athletics (TRA permit) |
| Highlights | Thames Path and Ridgeway, Grand Slam Finale |
Course & Terrain
Four 25-mile out-and-back legs from Goring & Streatley, run in order: Thames Path to Little Wittenham, Ridgeway to Swyncombe Farm, Ridgeway west to Chain Hill, and Thames Path to Reading. Centurion gives the terrain as 80% trail and 20% road.
Key course features to know before comparing this race:
- Thames Path National Trail
- The Ridgeway National Trail
- Return to Goring every 25 miles
Entry & Logistics
| Registration and fees | Check the official event website for current availability, deadlines, prices, taxes, and refund terms. |
|---|---|
| Qualification | A 50-mile race finished within 15 hours between January 1, 2021 and race day; qualifiers are checked six weeks before the race. |
| Support model | 16 aid stations including the finish. Hot drinks are served on legs two to four, and hot food at Goring. |
| Crew / pacers | Crews are not allowed anywhere on the course. One pacer may join at Goring at mile 75 and must run the whole final 25-mile leg; handovers are not allowed. |
| Drop bags | One drop bag of up to 30 liters, available at Goring at miles 25, 50 and 75 and at the finish. |
| Logistics note | Check-in and bib collection run from 7:00 to 8:40 AM at Goring Village Hall (RG8 9AG). The briefing is at 8:45 AM and the start at 9:00 AM at the Morrell Room in Streatley. Goring & Streatley station is half a mile from HQ. HQ has no sleeping space, and supporters may not go to any checkpoint. |
Why This Race Matters
The Autumn 100 closes Centurion Running's 100-mile Grand Slam, which recognizes runners who finish the Thames Path, South Downs Way, North Downs Way and Autumn 100s in one calendar year. Centurion lists it as a Western States 100 qualifier and a UTMB Index event, and Western States includes it on its 2027 qualifier list with a 28-hour standard.
Historical benchmark notes in the directory record (verify current records with the linked official sources):
- Men: Hugh Tibbs, 13:03:59, 2025
- Women: Susie Chesher, 15:22:00, 2016
Preparing for a Race Like Centurion Autumn 100
The fixed-distance race guide covers the format as a whole. These guides go deeper:
- Walking strategy for ultramarathons: When and how to walk by terrain, effort and cutoffs.
- Crew and aid-station strategy: Crew tables, aid stops, drop bags and runner preferences.
- Hydration and sodium for ultramarathons: Fluid, sodium, thirst, sweat rate and hyponatremia risk.
- Tapering for ultramarathons: Plan the taper and race week around your own recovery.
Planning Notes
- Train for terrain-specific fatigue. Technical trails and mountain courses demand downhill durability, hiking efficiency, and reliable night lighting.
- The directory does not mark this as having simpler logistics. Confirm qualification, terrain, support, registration, medical, and withdrawal requirements before planning around it.
- Up to 13 hours of darkness
- Busy road crossings with no marshals
- Riverside sections can turn muddy or flood after rain
- One-hour penalty for each missing item of mandatory kit
Event FAQs
Is the Autumn 100 a Western States or UTMB qualifier?
Yes. Centurion's FAQ says the race is a Western States 100 qualifier and a UTMB Index event. Western States lists the October 2026 Autumn 100 as a qualifier for its 2027 race, with a 28-hour time standard.
Can supporters meet runners on the course?
Only away from the checkpoints. Centurion bans supporters from every checkpoint and does not allow crewing, but they may cheer from places such as Wallingford town center, Benson Waterfront, Bury Down car park and Kings Meadow in Reading. Each leg is an out-and-back, so each spot sees runners twice.
Related Preparation
- Compare this race in the full 2026 calendar
- Open the Fixed-Distance format guide
- Compare all race formats
- Use the timed-race pace calculator
- Plan checkpoint arrivals and cutoff buffers
- Build a crew and drop-bag plan
- Build a race-specific gear checklist
Verification & Sources
Verification scope: the listed edition's date, location, format, and available logistics were checked against the event-specific official sources below during the directory review dated October 12, 2026. Organizers can revise details after review.
- Official Autumn 100 2026 race page — https://www.centurionrunning.com/races/autumn-100-2026
- Official 2026 entry status and refund policy — https://www.centurionrunning.com/races/autumn-100-2026/section/register
- Official race-day schedule — https://www.centurionrunning.com/races/autumn-100-2026/section/schedule
- Official 2026 aid stations and cutoffs — https://www.centurionrunning.com/races/autumn-100-2026/aidstations
- Official runner information pack — https://www.centurionrunning.com/races/autumn-100-2026/section/infopack
- Official race rules — https://www.centurionrunning.com/races/autumn-100-2026/section/rules
- Official FAQ, including qualifier status — https://www.centurionrunning.com/races/autumn-100-2026/section/faqs
- Official 2026 entrant list — https://www.centurionrunning.com/races/autumn-100-2026/entrants
- Official supporter guidance and viewing spots — https://www.centurionrunning.com/races/autumn-100-2026/section/supporters
- Centurion 100-mile Grand Slam — https://www.centurionrunning.com/section/grandslam
- Open Tracking 2026 live tracking, linked from Centurion's Live page — https://live.opentracking.co.uk/A100-2026/
- Western States 2027 qualifying races (cross-check) — https://www.wser.org/qualifying-races/
- Multiday Running event directory review scope: October 12, 2026.