PB potential
- Beachy Head Marathon Ultramarathon
- Unavailable
South Downs Way 100 Ultramarathon vs Beachy Head Marathon Ultramarathon
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofSouth Downs Way 100 Ultramarathon or Beachy Head Marathon Ultramarathon — which comes out ahead?
South Downs Way 100 Ultramarathon and Beachy Head Marathon Ultramarathon split the available advantages, so the better choice depends on which metric matters most to the runner.
Route comparison snapshot
South Downs Way 100 Ultramarathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 4.1% Favoured
- flat grade share
- 34.7% Favoured
- lower ascent
- 3,410 m
- climbing density
- 21.2 m/km
- net elevation
- -94 m
- maximum grade
- 31.8%
Beachy Head Marathon Ultramarathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 5.7%
- flat grade share
- 25.3%
- lower ascent
- 1,308 m
- climbing density
- 24.9 m/km
- net elevation
- 2 m
- maximum grade
- 31.2%
| Metric | South Downs Way 100 Ultramarathon | Beachy Head Marathon Ultramarathon |
|---|---|---|
| PB potential | 83/100 | Unavailable |
| Flat grade share | 34.7% ✓ | 25.3% |
| GAP factor (% slower than flat) | 4.1% ✓ | 5.7% |
| Uphill share | 32.7% | 37.6% |
| Steep-up share | 13.3% | 16.1% |
| Downhill share | 32.6% | 37.1% |
| Total ascent (m) | 3,410 m | 1,308 m |
| Climbing density (m/km) | 21.2 m/km | 24.9 m/km |
| Longest climb length (m) | 2,970 m | 2,340 m |
| Longest climb gain (m) | 194 m | 146 m |
| Longest climb average grade | 6.5% | 6.3% |
| Total descent (m) | 3,504 m | 1,305 m |
| Net elevation (m) | -94 m | 2 m |
| Max absolute grade | 31.8% | 31.2% |
| Start elevation (m) | 99 m | 49 m |
| Finish elevation (m) | 5 m | 51 m |
| Median finish context (s) | 24:53:35 | Unavailable |
| Value | 48/100 | Unavailable |
| Beginner-friendliness | 66/100 | Unavailable |
| Scenic score | 91/100 | 95/100 ✓ |
| Conditions | 49/100 | 67/100 ✓ |
| Entry fee (GBP) | £220 | Unavailable |
| Lowest modelled true cost (GBP) | £350 | Unavailable |
Flat grade share
- South Downs Way 100 Ultramarathon
- 34.7% Favoured
GAP factor (% slower than flat)
- South Downs Way 100 Ultramarathon
- 4.1% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
- South Downs Way 100 Ultramarathon
- 21.2 m/km
- Beachy Head Marathon Ultramarathon
- 24.9 m/km
Longest climb length (m)
Longest climb gain (m)
Longest climb average grade
Total descent (m)
Net elevation (m)
Max absolute grade
Start elevation (m)
Finish elevation (m)
Median finish context (s)
- Beachy Head Marathon Ultramarathon
- Unavailable
Value
- Beachy Head Marathon Ultramarathon
- Unavailable
Beginner-friendliness
- Beachy Head Marathon Ultramarathon
- Unavailable
Scenic score
- Beachy Head Marathon Ultramarathon
- 95/100 Favoured
Conditions
- Beachy Head Marathon Ultramarathon
- 67/100 Favoured
Entry fee (GBP)
- Beachy Head Marathon Ultramarathon
- Unavailable
Lowest modelled true cost (GBP)
- Beachy Head Marathon Ultramarathon
- Unavailable
Only metrics available for at least one side are shown. A ✓ marks the better value for each metric (higher-is-better aware). Scores are out of 100 when available. Ascent, climbing density, max absolute grade and median finish describe course or field context and are not marked as better or worse.
Race facts that change the decision
| Fact | South Downs Way 100 Ultramarathon | Beachy Head Marathon Ultramarathon |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-06-13 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-10-24 (legacy event-level date). |
| Location | Winchester to Eastbourne, South East | Eastbourne, South East |
| Actual distance | 160.9 km | 52.6 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Point To Point | Unavailable |
| Surface | Mostly trail (about 85% trail, 15% road) | Unavailable |
| Elevation character | Rolling | Unavailable |
| Terrain | Trail, Road, Track | Road |
| Scenery | Countryside, Historic, Forest, Coastal, Riverside | Coastal, Parkland, Countryside, Forest, Riverside, Waterfront |
| Atmosphere | Scenic Tour, Destination, Competitive | Scenic Tour, Destination |
| Technicality | Moderate | Unavailable |
| Total ascent | 3,410 m | 1,308 m |
| Climbing density | 21.2 m/km | 24.9 m/km |
| Total descent | 3,504 m | 1,305 m |
| Net elevation | -94 m | 2 m |
| Max absolute grade | 31.8% | 31.2% |
| Flat grade share | 34.7% | 25.3% |
| GAP factor | 4.1% | 5.7% |
| Cutoff | 30:00:00 | 9:00:00 |
| Field cap | 600 | 200 |
| Latest finishers | 357 | Unavailable |
| Entry model | Qualifier | Qualifier |
| Entry fee | £220 | Unavailable |
| Lowest modelled true cost | £350 | Unavailable |
| Cost model origin | National Average | Unavailable |
Schedule
- South Downs Way 100 Ultramarathon
Exact race date not confirmed. Event weekend starts 2026-06-13 (legacy event-level date).
- Beachy Head Marathon Ultramarathon
Exact race date not confirmed. Event weekend starts 2026-10-24 (legacy event-level date).
Location
- South Downs Way 100 Ultramarathon
- Winchester to Eastbourne, South East
- Beachy Head Marathon Ultramarathon
- Eastbourne, South East
Actual distance
- South Downs Way 100 Ultramarathon
- 160.9 km
- Beachy Head Marathon Ultramarathon
- 52.6 km
raceindex.org mapped route held
- South Downs Way 100 Ultramarathon
- Held
- Beachy Head Marathon Ultramarathon
- Held
raceindex.org elevation profile held
- South Downs Way 100 Ultramarathon
- Held
- Beachy Head Marathon Ultramarathon
- Held
Course type
- South Downs Way 100 Ultramarathon
- Point To Point
- Beachy Head Marathon Ultramarathon
- Unavailable
Surface
- South Downs Way 100 Ultramarathon
- Mostly trail (about 85% trail, 15% road)
- Beachy Head Marathon Ultramarathon
- Unavailable
Elevation character
- South Downs Way 100 Ultramarathon
- Rolling
- Beachy Head Marathon Ultramarathon
- Unavailable
Terrain
- South Downs Way 100 Ultramarathon
- Trail, Road, Track
- Beachy Head Marathon Ultramarathon
- Road
Scenery
- South Downs Way 100 Ultramarathon
- Countryside, Historic, Forest, Coastal, Riverside
- Beachy Head Marathon Ultramarathon
- Coastal, Parkland, Countryside, Forest, Riverside, Waterfront
Atmosphere
- South Downs Way 100 Ultramarathon
- Scenic Tour, Destination, Competitive
- Beachy Head Marathon Ultramarathon
- Scenic Tour, Destination
Technicality
- South Downs Way 100 Ultramarathon
- Moderate
- Beachy Head Marathon Ultramarathon
- Unavailable
Total ascent
- South Downs Way 100 Ultramarathon
- 3,410 m
- Beachy Head Marathon Ultramarathon
- 1,308 m
Climbing density
- South Downs Way 100 Ultramarathon
- 21.2 m/km
- Beachy Head Marathon Ultramarathon
- 24.9 m/km
Total descent
- South Downs Way 100 Ultramarathon
- 3,504 m
- Beachy Head Marathon Ultramarathon
- 1,305 m
Net elevation
- South Downs Way 100 Ultramarathon
- -94 m
- Beachy Head Marathon Ultramarathon
- 2 m
Max absolute grade
- South Downs Way 100 Ultramarathon
- 31.8%
- Beachy Head Marathon Ultramarathon
- 31.2%
Flat grade share
- South Downs Way 100 Ultramarathon
- 34.7%
- Beachy Head Marathon Ultramarathon
- 25.3%
GAP factor
- South Downs Way 100 Ultramarathon
- 4.1%
- Beachy Head Marathon Ultramarathon
- 5.7%
Cutoff
- South Downs Way 100 Ultramarathon
- 30:00:00
- Beachy Head Marathon Ultramarathon
- 9:00:00
Field cap
- South Downs Way 100 Ultramarathon
- 600
- Beachy Head Marathon Ultramarathon
- 200
Latest finishers
- South Downs Way 100 Ultramarathon
- 357
- Beachy Head Marathon Ultramarathon
- Unavailable
Entry model
- South Downs Way 100 Ultramarathon
- Qualifier
- Beachy Head Marathon Ultramarathon
- Qualifier
Entry fee
- South Downs Way 100 Ultramarathon
- £220
- Beachy Head Marathon Ultramarathon
- Unavailable
Lowest modelled true cost
- South Downs Way 100 Ultramarathon
- £350
- Beachy Head Marathon Ultramarathon
- Unavailable
Cost model origin
- South Downs Way 100 Ultramarathon
- National Average
- Beachy Head Marathon Ultramarathon
- Unavailable
Facts are shown only when they exist in the sourced race record; Not held means no sourced value is held for that race.
Common questions
Which is flatter, South Downs Way 100 Ultramarathon or Beachy Head Marathon Ultramarathon?
South Downs Way 100 Ultramarathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.