Independent planning tool by ULTRALABS
UK Ultra Race Planner
Plan your checkpoints, stops and crew handovers. Pick a race, enter a target finish time, and see where every cut-off falls against your plan. No account, nothing sent anywhere.
Montane Lakeland 50 & 100 event team
Lakeland 50
Montane Lakeland 50, 50 miles, Dalemain to Coniston
- Edition
- 2026 edition (25 July 2026)
- Status
- Historical edition
- Limit
- 24 h 00 min
- Checkpoints
- 6 between start and finish
Also: 2027 (details pending)
Open the planner →Montane Lakeland 50 & 100 event team
Lakeland 100
Montane Lakeland 100, 105 miles, Coniston loop
- Edition
- 2026 edition (24 to 26 July 2026)
- Status
- Historical edition
- Limit
- 40 h 00 min
- Checkpoints
- 14 between start and finish
Also: 2027 (details pending)
Open the planner →Arc of Attrition by UTMB
Arc of Attrition 100
Arc 100M by UTMB, the 100-mile race. Not the Arc 100K, 50K or 20K.
- Edition
- 2027 edition (22 January 2027, Coverack to Perranporth), provisional table
- Status
- Partially verified
- Limit
- 37 h 30 min
- Checkpoints
- 9 between start and finish
Also: 2026 (historical edition)
Open the planner →Centurion Running
South Downs Way 100
Centurion South Downs Way 100, 100 miles, Winchester to Eastbourne
- Edition
- 2027 edition, wave 1 (05:30 start, 12 June 2027)
- Status
- Ready to plan
- Limit
- 30 h 00 min
- Checkpoints
- 12 between start and finish
Also: 2027 (ready to plan), 2026 (historical edition)
Open the planner →Centurion Running
Thames Path 100
Centurion Thames Path 100, 100 miles, Richmond to Oxford
- Edition
- 2027 edition (1 May 2027, 09:00 start)
- Status
- Ready to plan
- Limit
- 30 h 00 min
- Checkpoints
- 12 between start and finish
Also: 2026 (historical edition)
Open the planner →The West Highland Way Race Organisation
West Highland Way Race
The West Highland Way Race, 95 miles, Milngavie to Fort William, 01:00 Saturday start
- Edition
- 2026 edition, the 40th (20 June 2026)
- Status
- Historical edition
- Limit
- 35 h 00 min
- Checkpoints
- 12 between start and finish
Also: 2027 (details pending)
Open the planner →The Spine Race
Montane Winter Spine
The full 268-mile winter Spine Race, Edale to Kirk Yetholm. Not the Challenger, Sprint, MRT or summer events.
- Edition
- 2027 edition (10 to 16 January 2027), cut-offs verified, distances secondary
- Status
- Partially verified
- Limit
- 156 h 00 min
- Checkpoints
- 7 between start and finish
What the states mean
Ready to plan means the organiser has published this edition’s checkpoints and cut-offs and each one is traced to their page. Historical means a past edition, fully published, labelled as such; the next race may differ. Partially verified means some fields are provisional or from a secondary source, and the page says which. Details pending means the organiser has announced the edition but not its checkpoints, and no planning is offered for it.
Nothing here is invented to fill a gap. Where a cut-off, a distance or a crew rule is not published, the planner says unknown, and unknown is never treated as permitted.
The schedule itself is arithmetic: your target minus your stops, shared across the sections by distance unless you lock or adjust them. It tells you what the cut-offs demand of a plan, not whether you can run it. The race guides cover what each race demands of the training.