Flat grade share
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 84.9% Favoured
Norfolk Festival of Running (King's Lynn) 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 ofNorfolk Festival of Running (King's Lynn) Ultramarathon or Endurancelife Suffolk (Dunwich) Ultramarathon — which comes out ahead?
Endurancelife Suffolk (Dunwich) Ultramarathon has the stronger available profile on flat grade share, course flatness and scenery score.
Route comparison snapshot
Norfolk Festival of Running (King's Lynn) Ultramarathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 1.6%
- flat grade share
- 45.4%
- lower ascent
- 627 m
- climbing density
- 12.5 m/km
- net elevation
- -1 m
- maximum grade
- 9.8%
Endurancelife Suffolk (Dunwich) Ultramarathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.3% Favoured
- flat grade share
- 84.9% Favoured
- lower ascent
- 247 m
- climbing density
- 4.7 m/km
- net elevation
- 0 m
- maximum grade
- 8.4%
| Metric | Norfolk Festival of Running (King's Lynn) Ultramarathon | Endurancelife Suffolk (Dunwich) Ultramarathon |
|---|---|---|
| Flat grade share | 45.4% | 84.9% ✓ |
| GAP factor (% slower than flat) | 1.6% | 0.3% ✓ |
| Uphill share | 27.3% | 7.0% |
| Steep-up share | 5.9% | 0.2% |
| Downhill share | 27.3% | 8.0% |
| Total ascent (m) | 627 m | 247 m |
| Climbing density (m/km) | 12.5 m/km | 4.7 m/km |
| Longest climb length (m) | 140 m | 1,170 m |
| Longest climb gain (m) | 9 m | 18 m |
| Longest climb average grade | 6.3% | 1.5% |
| Total descent (m) | 628 m | 246 m |
| Net elevation (m) | -1 m | 0 m |
| Max absolute grade | 9.8% | 8.4% |
| Start elevation (m) | 18 m | 20 m |
| Finish elevation (m) | 17 m | 20 m |
| Value | 83/100 ✓ | 77/100 |
| Scenic score | 65/100 | 100/100 ✓ |
| Conditions | 61/100 | 72/100 ✓ |
| Entry fee (GBP) | £38 ✓ | £71 |
| Lowest modelled true cost (GBP) | £168 ✓ | £201 |
GAP factor (% slower than flat)
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 0.3% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (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
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- 83/100 Favoured
Scenic score
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 100/100 Favoured
Conditions
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 72/100 Favoured
Entry fee (GBP)
Lowest modelled true cost (GBP)
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 | Norfolk Festival of Running (King's Lynn) Ultramarathon | Endurancelife Suffolk (Dunwich) Ultramarathon |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-07-12 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-10-10 (legacy event-level date). |
| Location | King's Lynn, East Of England | Dunwich, East Of England |
| Actual distance | 50 km | 52.6 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Laps | Loop |
| Surface | Trail course over sand, gravel and grass | Forest, moorland, grass and beach terrain, rated moderate in difficulty. |
| Terrain | Trail | Trail |
| Scenery | Parkland, Countryside, Lakeside, Forest | Coastal, Parkland, Historic, Forest, Moorland, Countryside |
| Atmosphere | Festival, Community | Community, Scenic Tour |
| Total ascent | 627 m | 247 m |
| Climbing density | 12.5 m/km | 4.7 m/km |
| Total descent | 628 m | 246 m |
| Net elevation | -1 m | 0 m |
| Max absolute grade | 9.8% | 8.4% |
| Flat grade share | 45.4% | 84.9% |
| GAP factor | 1.6% | 0.3% |
| Cutoff | 6:00:00 | Unavailable |
| Entry model | Open | Open |
| Entry fee | £38 | £71 |
| Lowest modelled true cost | £168 | £201 |
| Cost model origin | National Average | National Average |
| Measured course | Unavailable | No |
Schedule
- Norfolk Festival of Running (King's Lynn) Ultramarathon
Exact race date not confirmed. Event weekend starts 2026-07-12 (legacy event-level date).
- Endurancelife Suffolk (Dunwich) Ultramarathon
Exact race date not confirmed. Event weekend starts 2026-10-10 (legacy event-level date).
Location
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- King's Lynn, East Of England
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Dunwich, East Of England
Actual distance
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- 50 km
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 52.6 km
raceindex.org mapped route held
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- Held
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Held
raceindex.org elevation profile held
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- Held
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Held
Course type
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- Laps
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Loop
Surface
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- Trail course over sand, gravel and grass
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Forest, moorland, grass and beach terrain, rated moderate in difficulty.
Terrain
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- Trail
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Trail
Scenery
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- Parkland, Countryside, Lakeside, Forest
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Coastal, Parkland, Historic, Forest, Moorland, Countryside
Atmosphere
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- Festival, Community
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Community, Scenic Tour
Total ascent
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- 627 m
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 247 m
Climbing density
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- 12.5 m/km
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 4.7 m/km
Total descent
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- 628 m
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 246 m
Net elevation
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- -1 m
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 0 m
Max absolute grade
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- 9.8%
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 8.4%
Flat grade share
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- 45.4%
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 84.9%
GAP factor
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- 1.6%
- Endurancelife Suffolk (Dunwich) Ultramarathon
- 0.3%
Cutoff
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- 6:00:00
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Unavailable
Entry model
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- Open
- Endurancelife Suffolk (Dunwich) Ultramarathon
- Open
Entry fee
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- £38
- Endurancelife Suffolk (Dunwich) Ultramarathon
- £71
Lowest modelled true cost
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- £168
- Endurancelife Suffolk (Dunwich) Ultramarathon
- £201
Cost model origin
- Norfolk Festival of Running (King's Lynn) Ultramarathon
- National Average
- Endurancelife Suffolk (Dunwich) Ultramarathon
- National Average
Measured course
- Norfolk Festival of Running (King's Lynn) 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, Norfolk Festival of Running (King's Lynn) Ultramarathon or Endurancelife Suffolk (Dunwich) Ultramarathon?
Endurancelife Suffolk (Dunwich) Ultramarathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.