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