Flat grade share
- Stort30 Ultramarathon
- 95.8% Favoured
Stort30 Ultramarathon vs Endurancelife Suffolk (Dunwich) Ultramarathon
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofStort30 Ultramarathon or Endurancelife Suffolk (Dunwich) Ultramarathon — which comes out ahead?
Stort30 Ultramarathon has the stronger available profile on flat grade share, course flatness and value score.
Route comparison snapshot
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%
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%
| Metric | Stort30 Ultramarathon | Endurancelife Suffolk (Dunwich) Ultramarathon |
|---|---|---|
| Flat grade share | 95.8% ✓ | 84.9% |
| GAP factor (% slower than flat) | 0.1% ✓ | 0.3% |
| Uphill share | 2.0% | 7.0% |
| Steep-up share | 0.1% | 0.2% |
| Downhill share | 2.2% | 8.0% |
| Total ascent (m) | 99 m | 247 m |
| Climbing density (m/km) | 2.0 m/km | 4.7 m/km |
| Longest climb length (m) | 430 m | 1,170 m |
| Longest climb gain (m) | 12 m | 18 m |
| Longest climb average grade | 2.8% | 1.5% |
| Total descent (m) | 98 m | 246 m |
| Net elevation (m) | 0 m | 0 m |
| Max absolute grade | 7.1% | 8.4% |
| Start elevation (m) | 83 m | 20 m |
| Finish elevation (m) | 83 m | 20 m |
| Value | 80/100 ✓ | 77/100 |
| Scenic score | 34/100 | 100/100 ✓ |
| Conditions | 81/100 ✓ | 72/100 |
| Entry fee (GBP) | £55 ✓ | £71 |
| Lowest modelled true cost (GBP) | £185 ✓ | £201 |
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
- Stort30 Ultramarathon
- 34/100
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 100/100 Favoured
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 | Stort30 Ultramarathon | Endurancelife Suffolk (Dunwich) Ultramarathon |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-10-25 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-10-10 (legacy event-level date). |
| Location | Bishop's Stortford, East Of England | Dunwich, East Of England |
| Actual distance | 48.3 km | 52.6 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Out And Back | Loop |
| Surface | Mostly grassy trail or graded footpath, with graded gravel paths and riverside trail; first and last half mile on footpath/tarmac. | Forest, moorland, grass and beach terrain, rated moderate in difficulty. |
| Elevation character | Pancake Flat | Unavailable |
| Terrain | Towpath, Trail | Trail |
| Scenery | Riverside, Countryside | Coastal, Parkland, Historic, Forest, Moorland, Countryside |
| Atmosphere | Community, Competitive | Community, Scenic Tour |
| Technicality | Non Technical | Unavailable |
| Total ascent | 99 m | 247 m |
| Climbing density | 2.0 m/km | 4.7 m/km |
| Total descent | 98 m | 246 m |
| Net elevation | 0 m | 0 m |
| Max absolute grade | 7.1% | 8.4% |
| Flat grade share | 95.8% | 84.9% |
| GAP factor | 0.1% | 0.3% |
| Cutoff | 8:00:00 | Unavailable |
| Field cap | 64 | Unavailable |
| Entry model | Open | Open |
| Entry fee | £55 | £71 |
| Lowest modelled true cost | £185 | £201 |
| Cost model origin | National Average | National Average |
| Measured course | Unavailable | No |
Schedule
- Stort30 Ultramarathon
Exact race date not confirmed. Event weekend starts 2026-10-25 (legacy event-level date).
- Endurancelife Suffolk (Dunwich) Ultramarathon
Exact race date not confirmed. Event weekend starts 2026-10-10 (legacy event-level date).
Location
- Stort30 Ultramarathon
- Bishop's Stortford, East Of England
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Dunwich, East Of England
Actual distance
- Stort30 Ultramarathon
- 48.3 km
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 52.6 km
raceindex.org mapped route held
- Stort30 Ultramarathon
- Held
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Held
raceindex.org elevation profile held
- Stort30 Ultramarathon
- Held
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Held
Course type
- Stort30 Ultramarathon
- Out And Back
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Loop
Surface
- Stort30 Ultramarathon
- Mostly grassy trail or graded footpath, with graded gravel paths and riverside trail; first and last half mile on footpath/tarmac.
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Forest, moorland, grass and beach terrain, rated moderate in difficulty.
Elevation character
- Stort30 Ultramarathon
- Pancake Flat
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Unavailable
Terrain
- Stort30 Ultramarathon
- Towpath, Trail
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Trail
Scenery
- Stort30 Ultramarathon
- Riverside, Countryside
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Coastal, Parkland, Historic, Forest, Moorland, Countryside
Atmosphere
- Stort30 Ultramarathon
- Community, Competitive
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Community, Scenic Tour
Technicality
- Stort30 Ultramarathon
- Non Technical
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Unavailable
Total ascent
- Stort30 Ultramarathon
- 99 m
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 247 m
Climbing density
- Stort30 Ultramarathon
- 2.0 m/km
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 4.7 m/km
Total descent
- Stort30 Ultramarathon
- 98 m
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 246 m
Net elevation
- Stort30 Ultramarathon
- 0 m
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 0 m
Max absolute grade
- Stort30 Ultramarathon
- 7.1%
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 8.4%
Flat grade share
- Stort30 Ultramarathon
- 95.8%
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 84.9%
GAP factor
- Stort30 Ultramarathon
- 0.1%
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 0.3%
Cutoff
- Stort30 Ultramarathon
- 8:00:00
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Unavailable
Field cap
- Stort30 Ultramarathon
- 64
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Unavailable
Entry model
- Stort30 Ultramarathon
- Open
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Open
Entry fee
- Stort30 Ultramarathon
- £55
- Endurancelife Suffolk (Dunwich) Ultramarathon
- £71
Lowest modelled true cost
- Stort30 Ultramarathon
- £185
- Endurancelife Suffolk (Dunwich) Ultramarathon
- £201
Cost model origin
- Stort30 Ultramarathon
- National Average
- Endurancelife Suffolk (Dunwich) Ultramarathon
- National Average
Measured course
- Stort30 Ultramarathon
- Unavailable
- Endurancelife Suffolk (Dunwich) Ultramarathon
- No
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, Stort30 Ultramarathon or Endurancelife Suffolk (Dunwich) Ultramarathon?
Stort30 Ultramarathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.