Results: 2026
| Category | Name | Result |
|---|---|---|
| Men | Kim Collison | 14:17:53 |
| Women | Jennie Dunkley | 16:45:37 |
178 of 247 starters finished.
Exact times are from Centurion’s results statistics; starter and finisher counts are from its October 18 race report.
Source: Centurion Running — official Autumn 100 statistics, 2026 results. Checked October 22, 2026.
Next edition: October 16, 2027. Centurion’s linked 2027 Grand Slam entry page confirms Autumn 100 on October 16–17, 2027. Its bundle entry deadline is not an individual Autumn 100 deadline.
Event Overview
A 100-mile trail race from Goring-on-Thames made of four 25-mile out-and-back legs on the Thames Path and the Ridgeway, with about 5,000 ft of climbing and a 28-hour limit.
| 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 | The 2026 race is complete. Centurion reports 178 finishers from 247 starters; Kim Collison and Jennie Dunkley won the men’s and women’s races. The 2026 course and entry information below is retained as an archive. |
| 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 | 247 starters and 178 finishers in 2026, according to Centurion’s race report. |
| 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
Format & Support (as run)
| 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. |
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.
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
- Print a pace band for your goal time
- Estimate race calories and plan fueling
- 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 2026 race report and field counts — https://www.centurionrunning.com/reports/2026/autumn-100-2026-race-report
- Official Autumn 100 results statistics — https://www.centurionrunning.com/stats/A100
- Organizer-linked 2027 Grand Slam entry and race dates — https://www.sientries.co.uk/event.php?event_id=17965
- 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.