Flat grade share
- Stort30 Ultramarathon
- 95.8% Favoured
Endurancelife Suffolk (Dunwich) Ultramarathon vs Stort30 Ultramarathon
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofEndurancelife Suffolk (Dunwich) Ultramarathon or Stort30 Ultramarathon — which comes out ahead?
Stort30 Ultramarathon has the stronger available profile on flat grade share, course flatness and value score.
Route comparison snapshot
Endurancelife Suffolk (Dunwich) Ultramarathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.3%
- flat grade share
- 84.9%
- lower ascent
- 247 m
- climbing density
- 4.7 m/km
- net elevation
- 0 m
- maximum grade
- 8.4%
Stort30 Ultramarathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.1% Favoured
- flat grade share
- 95.8% Favoured
- lower ascent
- 99 m
- climbing density
- 2.0 m/km
- net elevation
- 0 m
- maximum grade
- 7.1%
| Metric | Endurancelife Suffolk (Dunwich) Ultramarathon | Stort30 Ultramarathon |
|---|---|---|
| Flat grade share | 84.9% | 95.8% ✓ |
| GAP factor (% slower than flat) | 0.3% | 0.1% ✓ |
| Uphill share | 7.0% | 2.0% |
| Steep-up share | 0.2% | 0.1% |
| Downhill share | 8.0% | 2.2% |
| Total ascent (m) | 247 m | 99 m |
| Climbing density (m/km) | 4.7 m/km | 2.0 m/km |
| Longest climb length (m) | 1,170 m | 430 m |
| Longest climb gain (m) | 18 m | 12 m |
| Longest climb average grade | 1.5% | 2.8% |
| Total descent (m) | 246 m | 98 m |
| Net elevation (m) | 0 m | 0 m |
| Max absolute grade | 8.4% | 7.1% |
| Start elevation (m) | 20 m | 83 m |
| Finish elevation (m) | 20 m | 83 m |
| Value | 77/100 | 80/100 ✓ |
| Scenic score | 100/100 ✓ | 34/100 |
| Conditions | 72/100 | 81/100 ✓ |
| Entry fee (GBP) | £71 | £55 ✓ |
| Lowest modelled true cost (GBP) | £201 | £185 ✓ |
GAP factor (% slower than flat)
- Stort30 Ultramarathon
- 0.1% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
- Stort30 Ultramarathon
- 2.0 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)
Value
- Stort30 Ultramarathon
- 80/100 Favoured
Scenic score
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 100/100 Favoured
- Stort30 Ultramarathon
- 34/100
Conditions
- Stort30 Ultramarathon
- 81/100 Favoured
Entry fee (GBP)
- Stort30 Ultramarathon
- £55 Favoured
Lowest modelled true cost (GBP)
- Stort30 Ultramarathon
- £185 Favoured
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 | Endurancelife Suffolk (Dunwich) Ultramarathon | Stort30 Ultramarathon |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-10-10 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-10-25 (legacy event-level date). |
| Location | Dunwich, East Of England | Bishop's Stortford, East Of England |
| Actual distance | 52.6 km | 48.3 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Loop | Out And Back |
| Surface | Forest, moorland, grass and beach terrain, rated moderate in difficulty. | Mostly grassy trail or graded footpath, with graded gravel paths and riverside trail; first and last half mile on footpath/tarmac. |
| Elevation character | Unavailable | Pancake Flat |
| Terrain | Trail | Towpath, Trail |
| Scenery | Coastal, Parkland, Historic, Forest, Moorland, Countryside | Riverside, Countryside |
| Atmosphere | Community, Scenic Tour | Community, Competitive |
| Technicality | Unavailable | Non Technical |
| Total ascent | 247 m | 99 m |
| Climbing density | 4.7 m/km | 2.0 m/km |
| Total descent | 246 m | 98 m |
| Net elevation | 0 m | 0 m |
| Max absolute grade | 8.4% | 7.1% |
| Flat grade share | 84.9% | 95.8% |
| GAP factor | 0.3% | 0.1% |
| Cutoff | Unavailable | 8:00:00 |
| Field cap | Unavailable | 64 |
| Entry model | Open | Open |
| Entry fee | £71 | £55 |
| Lowest modelled true cost | £201 | £185 |
| Cost model origin | National Average | National Average |
| Measured course | No | Unavailable |
Schedule
- Endurancelife Suffolk (Dunwich) Ultramarathon
Exact race date not confirmed. Event weekend starts 2026-10-10 (legacy event-level date).
- Stort30 Ultramarathon
Exact race date not confirmed. Event weekend starts 2026-10-25 (legacy event-level date).
Location
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Dunwich, East Of England
- Stort30 Ultramarathon
- Bishop's Stortford, East Of England
Actual distance
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 52.6 km
- Stort30 Ultramarathon
- 48.3 km
raceindex.org mapped route held
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Held
- Stort30 Ultramarathon
- Held
raceindex.org elevation profile held
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Held
- Stort30 Ultramarathon
- Held
Course type
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Loop
- Stort30 Ultramarathon
- Out And Back
Surface
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Forest, moorland, grass and beach terrain, rated moderate in difficulty.
- Stort30 Ultramarathon
- Mostly grassy trail or graded footpath, with graded gravel paths and riverside trail; first and last half mile on footpath/tarmac.
Elevation character
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Unavailable
- Stort30 Ultramarathon
- Pancake Flat
Terrain
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Trail
- Stort30 Ultramarathon
- Towpath, Trail
Scenery
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Coastal, Parkland, Historic, Forest, Moorland, Countryside
- Stort30 Ultramarathon
- Riverside, Countryside
Atmosphere
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Community, Scenic Tour
- Stort30 Ultramarathon
- Community, Competitive
Technicality
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Unavailable
- Stort30 Ultramarathon
- Non Technical
Total ascent
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 247 m
- Stort30 Ultramarathon
- 99 m
Climbing density
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 4.7 m/km
- Stort30 Ultramarathon
- 2.0 m/km
Total descent
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 246 m
- Stort30 Ultramarathon
- 98 m
Net elevation
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 0 m
- Stort30 Ultramarathon
- 0 m
Max absolute grade
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 8.4%
- Stort30 Ultramarathon
- 7.1%
Flat grade share
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 84.9%
- Stort30 Ultramarathon
- 95.8%
GAP factor
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 0.3%
- Stort30 Ultramarathon
- 0.1%
Cutoff
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Unavailable
- Stort30 Ultramarathon
- 8:00:00
Field cap
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Unavailable
- Stort30 Ultramarathon
- 64
Entry model
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Open
- Stort30 Ultramarathon
- Open
Entry fee
- Endurancelife Suffolk (Dunwich) Ultramarathon
- £71
- Stort30 Ultramarathon
- £55
Lowest modelled true cost
- Endurancelife Suffolk (Dunwich) Ultramarathon
- £201
- Stort30 Ultramarathon
- £185
Cost model origin
- Endurancelife Suffolk (Dunwich) Ultramarathon
- National Average
- Stort30 Ultramarathon
- National Average
Measured course
- Endurancelife Suffolk (Dunwich) Ultramarathon
- No
- Stort30 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, Endurancelife Suffolk (Dunwich) Ultramarathon or Stort30 Ultramarathon?
Stort30 Ultramarathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.