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UK Ultra Race Planner · Independent planning tool by ULTRALABS

Thames Path 100

Centurion Thames Path 100, 100 miles, Richmond to Oxford. Organiser: Centurion Running.

2027 edition (1 May 2027, 09:00 start) · Ready to plan · race data 2026-09-09

Training guide: Centurion Thames Path 100All races

Ready to plan: official details verified for this edition. Twelve aid stations along the river, every cut-off a departure deadline. Crew only at Henley, Reading, the finish and six crew-only points; nobody in Goring or Streatley. Pacers from Henley, one at a time.

Start to finish, including every stop and any sleep. Limit 30 h 00 min.

StopsEvery stop starts at 0 min. Set them all:then adjust each one in the table.

Enter a target finish time to see your schedule.

The checkpoint list below shows the official distances, cut-offs and access rules for 2027 edition (1 May 2027, 09:00 start) without a plan.

Checkpoint schedule for Thames Path 100, 2027 edition (1 May 2027, 09:00 start)
CheckpointDistanceSectionArriveStopDepartCut-offBuffer
Richmond (start)
startcrew allowed
Rules and notes
  • Crew: No parking in Whittaker Avenue or Heron Square beside the Town Hall.
  • Single 09:00 start on the Richmond waterfront beside the Old Town Hall.
0.0 miStart–––none published–
Walton on Thames
aid · timingcrew prohibitedno support runner
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews/ Pacers/ Supporters are not permitted to meet their runner at any point other than those listed. If your crew do assist you outside of the permitted points, you the runner will be disqualified.
  • Support runner: No pacers before the Henley aid station (mile 51).
  • Aid: Precision Fuel & Hydration gels, chews and electrolyte drink, Gu gels, water, cola, sweets, biscuits, nuts, fruit, sandwiches and wraps, savoury snacks.
  • Crew-only point Staines at mile 20.1 (waterfront between the Mercure Hotel and the A308 bridge).
10.5 mi
+10.5 mi
–
–
min
–
2027-05-01 12:40
must have left by
–
Wraysbury
aid · timingcrew prohibitedno support runner
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews/ Pacers/ Supporters are not permitted to meet their runner at any point other than those listed. If your crew do assist you outside of the permitted points, you the runner will be disqualified.
  • Support runner: No pacers before the Henley aid station (mile 51).
  • Aid: Precision Fuel & Hydration gels, chews and electrolyte drink, Gu gels, water, cola, sweets, biscuits, nuts, fruit, sandwiches and wraps, savoury snacks.
  • Crew-only point Windsor at mile 28 (between Victoria Bridge and Windsor/Eton Bridge).
22.0 mi
+11.5 mi
–
–
min
–
2027-05-01 15:40
must have left by
–
Boveney
aid · timingcrew prohibitedno support runner
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews/ Pacers/ Supporters are not permitted to meet their runner at any point other than those listed. If your crew do assist you outside of the permitted points, you the runner will be disqualified.
  • Support runner: No pacers before the Henley aid station (mile 51).
  • Aid: Precision Fuel & Hydration gels, chews and electrolyte drink, Gu gels, water, cola, sweets, biscuits, nuts, fruit, sandwiches and wraps, savoury snacks.
30.4 mi
+8.4 mi
–
–
min
–
2027-05-01 18:10
must have left by
–
Cookham
aid · timingcrew prohibitedno support runner
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews/ Pacers/ Supporters are not permitted to meet their runner at any point other than those listed. If your crew do assist you outside of the permitted points, you the runner will be disqualified.
  • Support runner: No pacers before the Henley aid station (mile 51).
  • Aid: Precision Fuel & Hydration gels, chews and electrolyte drink, Gu gels, water, cola, sweets, biscuits, nuts, fruit, sandwiches and wraps, savoury snacks.
  • Crew-only point Marlow at mile 42.4 (Gossmore Lane and Mill Road, and Mill Bank up to the bridge, not south of it; park with consideration to residents).
38.0 mi
+7.6 mi
–
–
min
–
2027-05-01 20:25
must have left by
–
Hurley
aid · timingcrew prohibitedno support runner
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews/ Pacers/ Supporters are not permitted to meet their runner at any point other than those listed. If your crew do assist you outside of the permitted points, you the runner will be disqualified.
  • Support runner: No pacers before the Henley aid station (mile 51).
  • Aid: Precision Fuel & Hydration gels, chews and electrolyte drink, Gu gels, water, cola, sweets, biscuits, nuts, fruit, sandwiches and wraps, savoury snacks. Hot drinks from Hurley onwards.
44.0 mi
+6.0 mi
–
–
min
–
2027-05-01 22:20
must have left by
–
Henley
aid · timing · crew point · drop bag · pacer pointcrew allowedsupport runner allowed
Rules and notes
  • Crew: Park along Mill Meadows Road (pay and display). Aid station at the far end of the meadows opposite the Rowing Museum.
  • Support runner: First pacer point. One pacer at a time, on foot only; join or hand over only at listed crew locations.
  • Drop bag: One bag, 50 x 30 x 30 cm maximum.
  • Aid: Precision Fuel & Hydration gels, chews and electrolyte drink, Gu gels, water, cola, sweets, biscuits, nuts, fruit, sandwiches and wraps, savoury snacks. Hot drinks from Hurley onwards. Hot food here.
51.0 mi
+7.0 mi
–
–
min
–
2027-05-02 00:20
must have left by
–
Reading
aid · timing · crew point · pacer pointcrew allowedsupport runner allowed
Rules and notes
  • Crew: Aid station up the ramp in the Waterside Centre. Parking off Thames Drive; the Park and Ride car park is pay to park with closure times.
  • Support runner: Pacers may be on the course here but may only join or change at listed crew locations.
  • Aid: Precision Fuel & Hydration gels, chews and electrolyte drink, Gu gels, water, cola, sweets, biscuits, nuts, fruit, sandwiches and wraps, savoury snacks. Hot drinks from Hurley onwards.
58.0 mi
+7.0 mi
–
–
min
–
2027-05-02 02:45
must have left by
–
Pangbourne
aid · timingcrew prohibitedsupport runner allowed
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews/ Pacers/ Supporters are not permitted to meet their runner at any point other than those listed. If your crew do assist you outside of the permitted points, you the runner will be disqualified.
  • Support runner: Pacers may be on the course here but may only join or change at listed crew locations.
  • Aid: Precision Fuel & Hydration gels, chews and electrolyte drink, Gu gels, water, cola, sweets, biscuits, nuts, fruit, sandwiches and wraps, savoury snacks. Hot drinks from Hurley onwards.
66.6 mi
+8.6 mi
–
–
min
–
2027-05-02 05:00
must have left by
–
Goring
aid · timing · drop bagcrew prohibitedsupport runner allowed
Rules and notes
  • Crew: UNDER NO CIRCUMSTANCES SHOULD CREW OR SUPPORTERS ATTEND GORING VILLAGE OR STREATLEY VILLAGE AT MILE 70-71 ON THE COURSE.
  • Support runner: Pacers may be on the course here but may only join or change at listed crew locations.
  • Drop bag: One bag, 50 x 30 x 30 cm maximum.
  • Aid: Precision Fuel & Hydration gels, chews and electrolyte drink, Gu gels, water, cola, sweets, biscuits, nuts, fruit, sandwiches and wraps, savoury snacks. Hot drinks from Hurley onwards. Hot food here.
70.8 mi
+4.2 mi
–
–
min
–
2027-05-02 06:15
must have left by
–
Wallingford
aid · timingcrew prohibitedsupport runner allowed
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews/ Pacers/ Supporters are not permitted to meet their runner at any point other than those listed. If your crew do assist you outside of the permitted points, you the runner will be disqualified.
  • Support runner: Pacers may be on the course here but may only join or change at listed crew locations.
  • Aid: Precision Fuel & Hydration gels, chews and electrolyte drink, Gu gels, water, cola, sweets, biscuits, nuts, fruit, sandwiches and wraps, savoury snacks. Hot drinks from Hurley onwards.
  • Crew-only point Benson at mile 78.9 (small park beside the Waterfront Cafe; parking charges payable by crew).
77.5 mi
+6.7 mi
–
–
min
–
2027-05-02 08:15
must have left by
–
Clifton Hampden
aid · timingcrew prohibitedsupport runner allowed
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews/ Pacers/ Supporters are not permitted to meet their runner at any point other than those listed. If your crew do assist you outside of the permitted points, you the runner will be disqualified.
  • Support runner: Pacers may be on the course here but may only join or change at listed crew locations.
  • Aid: Precision Fuel & Hydration gels, chews and electrolyte drink, Gu gels, water, cola, sweets, biscuits, nuts, fruit, sandwiches and wraps, savoury snacks. Hot drinks from Hurley onwards.
  • Marked deviation off the Thames Path to the aid station and back.
  • Crew-only points Culham (mile 89, either side of Tolgate Road at the river) and Abingdon (mile 91, meadow on the left before the Thames crossing).
85.0 mi
+7.5 mi
–
–
min
–
2027-05-02 10:30
must have left by
–
Lower Radley
aid · timingcrew prohibitedsupport runner allowed
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews/ Pacers/ Supporters are not permitted to meet their runner at any point other than those listed. If your crew do assist you outside of the permitted points, you the runner will be disqualified.
  • Support runner: Pacers may be on the course here but may only join or change at listed crew locations.
  • Aid: Precision Fuel & Hydration gels, chews and electrolyte drink, Gu gels, water, cola, sweets, biscuits, nuts, fruit, sandwiches and wraps, savoury snacks. Hot drinks from Hurley onwards.
95.0 mi
+10.0 mi
–
–
min
–
2027-05-02 13:30
must have left by
–
Oxford, Queens College Recreation Ground (finish)
finish · timing · drop bagcrew allowed
Rules and notes
  • Crew: Parking is limited: one car per runner.
100.0 mi
+5.0 mi
–
–––
2027-05-02 15:00
must arrive by
–

Times are Europe/London local time, with the day. Distances are the organiser’s cumulative figures converted to miles. Buffer is the cut-off minus your planned arrival or departure, whichever the organiser’s rule applies to. A missed cut-off is shown even when the finish is inside its limit. Colour is never the only signal; every status carries a word.

Yours to keep

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How this works

Method, assumptions and sources

Time budget. Your target is elapsed time from the start to the finish line. Every stop you enter, sleep included, is subtracted first; what is left is the moving budget. If the stops use up the target the tool says so rather than squeezing the moving time.

Sections. In “share the target” mode the moving budget is split across sections in proportion to their distance, so every section is at the same average speed. That is arithmetic, not a model of climbs, mud or night. Lock a section to a time you trust, or give it a factor (1.3 means you expect it to take 30% longer per mile than the rest), and the remainder is shared across the others. In “enter section times” mode your times decide the finish and the target is only compared.

Cut-offs. Each rule is compared against the instant it applies to. A departure rule is checked against your departure, so a stop can turn a cleared arrival into a missed cut-off. Where the organiser publishes a time without saying whether it is for arriving or leaving, the comparison is against departure and marked provisional. Exactly on the limit is judged by the organiser’s stated rule, or flagged when there is none. No cut-off in the table does not mean no limit.

Seconds. Everything is calculated in whole seconds and the total is conserved exactly; displayed minutes are rounded afterwards and never feed back into the comparison.

Scenarios. Changes are to section duration or stop length. Keep-finish scenarios reallocate the reduced moving budget; keep-moving scenarios push later times back with no renormalisation.

Verification is not accuracy. A verified checkpoint table tells you the rules are right. It says nothing about whether the constant-speed split matches how you will actually move.

Official sources for 2027 edition (1 May 2027, 09:00 start)

Not verified for this edition

  • whether a runner exactly on the cut-off minute may leave
  • whether a crew pass or pacer bib is required (stated for the South Downs race, not found for this one)
  • 2027 diversions for bridge, weir and path works are to be assessed nearer the time; the 2027 GPX file differs from the 2026 file and was not compared
  • 2027 permit number is pending and aid station locations are subject to change up to race day

Amendments and conflicts recorded

  • The infopack's drop-bag list says mile 71 for Goring while the aid-station table says 70.8; the table is used.
  • The race page's vital statistics say 13 aid stations; the table has 12 plus the finish.

Race data version 2026-09-09. Independent planning tool by ULTRALABS; not affiliated with the organiser. The organiser’s own documents are the authority and change between editions.