Flat grade share
- Bath & Bristol Railway Races Ultramarathon
- 96.7% Favoured
Bath & Bristol Railway Races Ultramarathon vs Two Tunnels Railway Races Ultramarathon
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofBath & Bristol Railway Races Ultramarathon or Two Tunnels Railway Races Ultramarathon — which comes out ahead?
Bath & Bristol Railway Races Ultramarathon has the stronger available profile on flat grade share, course flatness and scenery score.
Route comparison snapshot
Bath & Bristol Railway Races Ultramarathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.1% Favoured
- flat grade share
- 96.7% Favoured
- lower ascent
- 136 m
- climbing density
- 2.7 m/km
- net elevation
- 1 m
- maximum grade
- 6.7%
Two Tunnels Railway Races Ultramarathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 5.6%
- flat grade share
- 35.9%
- lower ascent
- 1,231 m
- climbing density
- 24.6 m/km
- net elevation
- 2 m
- maximum grade
- 17.3%
| Metric | Bath & Bristol Railway Races Ultramarathon | Two Tunnels Railway Races Ultramarathon |
|---|---|---|
| Flat grade share | 96.7% ✓ | 35.9% |
| GAP factor (% slower than flat) | 0.1% ✓ | 5.6% |
| Uphill share | 1.6% | 31.9% |
| Steep-up share | 0.1% | 17.1% |
| Downhill share | 1.7% | 32.2% |
| Total ascent (m) | 136 m | 1,231 m |
| Climbing density (m/km) | 2.7 m/km | 24.6 m/km |
| Longest climb length (m) | 3,370 m | 1,530 m |
| Longest climb gain (m) | 44 m | 108 m |
| Longest climb average grade | 1.3% | 7.1% |
| Total descent (m) | 135 m | 1,229 m |
| Net elevation (m) | 1 m | 2 m |
| Max absolute grade | 6.7% | 17.3% |
| Start elevation (m) | 18 m | 41 m |
| Finish elevation (m) | 19 m | 43 m |
| Value | 78/100 | 78/100 |
| Scenic score | 83/100 ✓ | 81/100 |
| Conditions | 81/100 ✓ | 62/100 |
| Entry fee (GBP) | £65 | £65 |
| Lowest modelled true cost (GBP) | £195 | £195 |
GAP factor (% slower than flat)
- Bath & Bristol Railway Races Ultramarathon
- 0.1% 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
Scenic score
- Bath & Bristol Railway Races Ultramarathon
- 83/100 Favoured
Conditions
- Bath & Bristol Railway Races Ultramarathon
- 81/100 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 | Bath & Bristol Railway Races Ultramarathon | Two Tunnels Railway Races Ultramarathon |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-10-11 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-08-16 (legacy event-level date). |
| Location | Bath, South West | Bath, South West |
| Actual distance | 50 km | 50 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Unavailable | Laps |
| Surface | Essentially 100% tarmac, aside from a small amount of grass at the start and finish | Traffic Free greenway path |
| Elevation character | Flat | Unavailable |
| Terrain | Road, Mixed, Trail | Trail |
| Scenery | Riverside, Countryside, Historic, City, Parkland | Parkland, Countryside, Riverside, City, Historic, Forest |
| Atmosphere | Scenic Tour | Scenic Tour, Community |
| Technicality | Non Technical | Unavailable |
| Total ascent | 136 m | 1,231 m |
| Climbing density | 2.7 m/km | 24.6 m/km |
| Total descent | 135 m | 1,229 m |
| Net elevation | 1 m | 2 m |
| Max absolute grade | 6.7% | 17.3% |
| Flat grade share | 96.7% | 35.9% |
| GAP factor | 0.1% | 5.6% |
| Cutoff | 8:30:00 | 8:30:00 |
| Entry model | Open | Open |
| Entry fee | £65 | £65 |
| Lowest modelled true cost | £195 | £195 |
| Cost model origin | National Average | National Average |
| Measured course | Yes | Yes |
Schedule
- Bath & Bristol Railway Races Ultramarathon
Exact race date not confirmed. Event weekend starts 2026-10-11 (legacy event-level date).
- Two Tunnels Railway Races Ultramarathon
Exact race date not confirmed. Event weekend starts 2026-08-16 (legacy event-level date).
Location
- Bath & Bristol Railway Races Ultramarathon
- Bath, South West
- Two Tunnels Railway Races Ultramarathon
- Bath, South West
Actual distance
- Bath & Bristol Railway Races Ultramarathon
- 50 km
- Two Tunnels Railway Races Ultramarathon
- 50 km
raceindex.org mapped route held
- Bath & Bristol Railway Races Ultramarathon
- Held
- Two Tunnels Railway Races Ultramarathon
- Held
raceindex.org elevation profile held
- Bath & Bristol Railway Races Ultramarathon
- Held
- Two Tunnels Railway Races Ultramarathon
- Held
Course type
- Bath & Bristol Railway Races Ultramarathon
- Unavailable
- Two Tunnels Railway Races Ultramarathon
- Laps
Surface
- Bath & Bristol Railway Races Ultramarathon
- Essentially 100% tarmac, aside from a small amount of grass at the start and finish
- Two Tunnels Railway Races Ultramarathon
- Traffic Free greenway path
Elevation character
- Bath & Bristol Railway Races Ultramarathon
- Flat
- Two Tunnels Railway Races Ultramarathon
- Unavailable
Terrain
- Bath & Bristol Railway Races Ultramarathon
- Road, Mixed, Trail
- Two Tunnels Railway Races Ultramarathon
- Trail
Scenery
- Bath & Bristol Railway Races Ultramarathon
- Riverside, Countryside, Historic, City, Parkland
- Two Tunnels Railway Races Ultramarathon
- Parkland, Countryside, Riverside, City, Historic, Forest
Atmosphere
- Bath & Bristol Railway Races Ultramarathon
- Scenic Tour
- Two Tunnels Railway Races Ultramarathon
- Scenic Tour, Community
Technicality
- Bath & Bristol Railway Races Ultramarathon
- Non Technical
- Two Tunnels Railway Races Ultramarathon
- Unavailable
Total ascent
- Bath & Bristol Railway Races Ultramarathon
- 136 m
- Two Tunnels Railway Races Ultramarathon
- 1,231 m
Climbing density
- Bath & Bristol Railway Races Ultramarathon
- 2.7 m/km
- Two Tunnels Railway Races Ultramarathon
- 24.6 m/km
Total descent
- Bath & Bristol Railway Races Ultramarathon
- 135 m
- Two Tunnels Railway Races Ultramarathon
- 1,229 m
Net elevation
- Bath & Bristol Railway Races Ultramarathon
- 1 m
- Two Tunnels Railway Races Ultramarathon
- 2 m
Max absolute grade
- Bath & Bristol Railway Races Ultramarathon
- 6.7%
- Two Tunnels Railway Races Ultramarathon
- 17.3%
Flat grade share
- Bath & Bristol Railway Races Ultramarathon
- 96.7%
- Two Tunnels Railway Races Ultramarathon
- 35.9%
GAP factor
- Bath & Bristol Railway Races Ultramarathon
- 0.1%
- Two Tunnels Railway Races Ultramarathon
- 5.6%
Cutoff
- Bath & Bristol Railway Races Ultramarathon
- 8:30:00
- Two Tunnels Railway Races Ultramarathon
- 8:30:00
Entry model
- Bath & Bristol Railway Races Ultramarathon
- Open
- Two Tunnels Railway Races Ultramarathon
- Open
Entry fee
- Bath & Bristol Railway Races Ultramarathon
- £65
- Two Tunnels Railway Races Ultramarathon
- £65
Lowest modelled true cost
- Bath & Bristol Railway Races Ultramarathon
- £195
- Two Tunnels Railway Races Ultramarathon
- £195
Cost model origin
- Bath & Bristol Railway Races Ultramarathon
- National Average
- Two Tunnels Railway Races Ultramarathon
- National Average
Measured course
- Bath & Bristol Railway Races Ultramarathon
- Yes
- Two Tunnels Railway Races Ultramarathon
- Yes
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, Bath & Bristol Railway Races Ultramarathon or Two Tunnels Railway Races Ultramarathon?
Bath & Bristol Railway Races Ultramarathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.