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UK Ultra Race Planner · Independent planning tool by ULTRALABS

South Downs Way 100

Centurion South Downs Way 100, 100 miles, Winchester to Eastbourne. Organiser: Centurion Running.

2027 edition, wave 1 (05:30 start, 12 June 2027) · Ready to plan · race data 2026-09-09

Training guide: South Downs Way 100All races

Ready to plan: official details verified for this edition. Twelve aid stations, every cut-off is a departure deadline, and crew may only meet you at the listed points. Pacers from Kithurst Hill crew point, one at a time, on foot.

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, wave 1 (05:30 start, 12 June 2027) without a plan.

Checkpoint schedule for South Downs Way 100, 2027 edition, wave 1 (05:30 start, 12 June 2027)
CheckpointDistanceSectionArriveStopDepartCut-offBuffer
Matterley Bowl (start)
startcrew allowed
Rules and notes
  • Crew: Parking on site, free of charge. One crew vehicle per runner, displaying the crew pass handed out at registration; maximum size a long wheel base transit, no motorhomes.
  • Wave 1 start 05:30. Waves are set about three weeks before the event from estimated finish time. Only wave 1 runners are eligible for overall awards; age-group awards from either wave.
0.0 miStart–––none published–
Beacon Hill Beeches
aid · timingcrew prohibitedno support runner
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews may meet runners or assist them ONLY at the points listed on the crew info page. If your crew do assist you outside of the permitted points, you the runner will be disqualified.
  • Support runner: No pacers of any kind before Kithurst Hill crew point (about mile 50 to 51).
  • Aid: Precision Fuel & Hydration gels, chews and electrolyte drink, Gu gels, water, cola, sweets, biscuits, nuts, fruit, sandwiches and wraps, savoury snacks.
11.4 mi
+11.4 mi
–
–
min
–
2027-06-12 09:00
must have left by
–
QECP (Queen Elizabeth Country Park)
aid · timing · crew pointcrew allowedno support runner
Rules and notes
  • Crew: Crew in the marshalled crewing area only, behind the fence: not the car park and not the checkpoint itself. Crews may not take water from the checkpoint.
  • Support runner: No pacers of any kind before Kithurst Hill crew point (about mile 50 to 51).
  • Aid: Precision Fuel & Hydration gels, chews and electrolyte drink, Gu gels, water, cola, sweets, biscuits, nuts, fruit, sandwiches and wraps, savoury snacks.
23.4 mi
+12.0 mi
–
–
min
–
2027-06-12 12:30
must have left by
–
South Harting
aid · timingcrew prohibitedno support runner
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews may meet runners or assist them ONLY at the points listed on the crew info page. If your crew do assist you outside of the permitted points, you the runner will be disqualified.
  • Support runner: No pacers of any kind before Kithurst Hill crew point (about mile 50 to 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 Harting Downs at mile 29.2 (National Trust car park corner); guide time only, not an enforced cut-off.
28.0 mi
+4.6 mi
–
–
min
–
2027-06-12 13:55
must have left by
–
Cocking
aid · timing · crew pointcrew allowedno support runner
Rules and notes
  • Crew: Do not park in the public car park. Drive up Hill Barn Lane and take the sharp right into the field at the top.
  • Support runner: No pacers of any kind before Kithurst Hill crew point (about mile 50 to 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 Bignor Hill at mile 43.8: remote, poor road; the organiser suggests using Houghton Farm instead.
36.6 mi
+8.6 mi
–
–
min
–
2027-06-12 16:30
must have left by
–
Houghton Farm
aid · timing · crew pointcrew allowedno support runner
Rules and notes
  • Crew: Access off Houghton Lane through the open gate; park in the field beside the checkpoint.
  • Support runner: No pacers of any kind before Kithurst Hill crew point (about mile 50 to 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 Houghton Farm onwards.
  • Moved for 2027: 45 miles and 19:45/20:45 in 2026, now 47.3 miles and 20:20/21:20.
  • Crew-only points after here: Kithurst Hill (mile 51, first pacer pick-up, 2 m height limit) and Chantry Post (mile 52, very small).
47.3 mi
+10.7 mi
–
–
min
–
2027-06-12 20:20
must have left by
–
Washington
aid · timing · crew point · drop bag · pacer pointcrew allowedsupport runner allowed
Rules and notes
  • Crew: Park at the bottom of London Road where it meets the A283 and walk up. Only one person (crew member or pacer) per runner inside the hall; no crew or pacer use of hall facilities.
  • Support runner: One pacer at a time, on foot only, pacer bib on display. Pacers 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 Houghton Farm onwards. Hot food here.
  • Headtorch and back-up light required from here.
  • Crew-only point Washington Crew at mile 56 (very small, not on the trail).
55.0 mi
+7.7 mi
–
–
min
–
2027-06-12 22:00
must have left by
–
Botolphs
aid · timingcrew prohibitedsupport runner allowed
Rules and notes
  • Crew: No crew access permitted here. Under no circumstances should crew or spectators park anywhere in Botolphs village.
  • 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 Houghton Farm onwards.
  • Crew-only point Devil's Dyke at mile 65.7 (park at Summer Down Road or Devil's Dyke car park).
60.9 mi
+5.9 mi
–
–
min
–
2027-06-12 23:50
must have left by
–
Saddlescombe Farm
aid · timingcrew prohibitedsupport runner allowed
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews may meet runners or assist them ONLY at the points listed on the crew info page. 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 Houghton Farm onwards.
  • Crew-only point Clayton Windmills at mile 69.8.
66.6 mi
+5.7 mi
–
–
min
–
2027-06-13 01:30
must have left by
–
Housedean Farm
aid · timing · drop bagcrew prohibitedsupport runner allowed
Rules and notes
  • Crew: No Crew Access Permitted. Crew or supporters parking on the road up to Housedean Farm earn a time penalty for their runner.
  • 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 Houghton Farm onwards.
76.6 mi
+10.0 mi
–
–
min
–
2027-06-13 04:25
must have left by
–
Southease
aid · timingcrew prohibitedsupport runner allowed
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews may meet runners or assist them ONLY at the points listed on the crew info page. 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 Houghton Farm onwards.
  • Crew-only points Firle Beacon (mile 86.4, within 200 m of the car park gates; parking charges payable by crew) and Bo Peep (mile 89, small).
84.0 mi
+7.4 mi
–
–
min
–
2027-06-13 06:40
must have left by
–
Alfriston
aid · timingcrew prohibitedsupport runner allowed
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews may meet runners or assist them ONLY at the points listed on the crew info page. 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 Houghton Farm onwards.
91.6 mi
+7.6 mi
–
–
min
–
2027-06-13 09:00
must have left by
–
Jevington
aid · timingcrew prohibitedsupport runner allowed
Rules and notes
  • Crew: No Crew Access Permitted at this aid station. Crews may meet runners or assist them ONLY at the points listed on the crew info page. 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 Houghton Farm onwards.
95.7 mi
+4.1 mi
–
–
min
–
2027-06-13 10:15
must have left by
–
Eastbourne Sports Park (finish)
finish · timing · drop bagcrew allowed
Rules and notes
  • Crew: Large gravel parking area in front of the track.
  • One lap of the athletics track to finish; friends and family may join the lap.
100.0 mi
+4.3 mi
–
–––
2027-06-13 11:30
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, wave 1 (05:30 start, 12 June 2027)

Not verified for this edition

  • whether a runner exactly on the cut-off minute may leave (the organiser says missing it by a minute means stopping; equality is not defined)
  • per-station distances in km and per-station ascent (organiser publishes miles only)
  • crew vehicle size: the 2027 infopack says both long wheel base and short wheel base in different paragraphs
  • 2027 permit number is TBC and aid station locations are subject to change up to race day

Amendments and conflicts recorded

  • Houghton Farm aid station moved from 45 miles to 47.3 miles for 2027, with its cut-offs moved 35 minutes later.
  • The infopack's drop-bag list rounds the miles (54 Washington, 76 Housedean) while the aid-station table says 55 and 76.6; the table is used.
  • The main page and FAQ say pacers from Kithurst Hill at mile 50; the crew page places Kithurst Hill at mile 51.

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.