Flat grade share
- Bath & Bristol Railway Races Half Marathon
- 99.7% Favoured
Bath & Bristol Railway Races Half Marathon vs Two Tunnels Railway Races Half Marathon
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 Half Marathon or Two Tunnels Railway Races Half Marathon — which comes out ahead?
Bath & Bristol Railway Races Half Marathon has the stronger available profile on flat grade share, course flatness and scenery score.
Route comparison snapshot
Bath & Bristol Railway Races Half Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.0% Favoured
- flat grade share
- 99.7% Favoured
- lower ascent
- 33 m
- climbing density
- 1.6 m/km
- net elevation
- 1 m
- maximum grade
- 2.4%
Two Tunnels Railway Races Half Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 5.4%
- flat grade share
- 42.9%
- lower ascent
- 489 m
- climbing density
- 23.2 m/km
- net elevation
- 2 m
- maximum grade
- 18.1%
| Metric | Bath & Bristol Railway Races Half Marathon | Two Tunnels Railway Races Half Marathon |
|---|---|---|
| Flat grade share | 99.7% ✓ | 42.9% |
| GAP factor (% slower than flat) | 0.0% ✓ | 5.4% |
| Uphill share | 0.2% | 28.5% |
| Steep-up share | 0.0% | 14.9% |
| Downhill share | 0.1% | 28.6% |
| Total ascent (m) | 33 m | 489 m |
| Climbing density (m/km) | 1.6 m/km | 23.2 m/km |
| Longest climb length (m) | 1,750 m | 1,840 m |
| Longest climb gain (m) | 13 m | 110 m |
| Longest climb average grade | 0.7% | 6.0% |
| Total descent (m) | 33 m | 487 m |
| Net elevation (m) | 1 m | 2 m |
| Max absolute grade | 2.4% | 18.1% |
| Start elevation (m) | 19 m | 41 m |
| Finish elevation (m) | 19 m | 43 m |
| Value | 82/100 | 82/100 |
| Scenic score | 83/100 ✓ | 77/100 |
| Conditions | 81/100 ✓ | 62/100 |
| Entry fee (GBP) | £46 | £46 |
| Lowest modelled true cost (GBP) | £176 | £176 |
GAP factor (% slower than flat)
- Bath & Bristol Railway Races Half Marathon
- 0.0% 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 Half Marathon
- 83/100 Favoured
Conditions
- Bath & Bristol Railway Races Half Marathon
- 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 Half Marathon | Two Tunnels Railway Races Half Marathon |
|---|---|---|
| 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 | 21.1 km | 21.1 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Out And Back | Unavailable |
| Surface | Essentially 100% tarmac, aside from a small amount of grass at the start and finish | Unavailable |
| Terrain | Trail | Trail |
| Scenery | Historic, Riverside, Countryside, City, Parkland | Parkland, Countryside, Riverside, City, Historic, Forest |
| Atmosphere | Scenic Tour | Scenic Tour, Community |
| Total ascent | 33 m | 489 m |
| Climbing density | 1.6 m/km | 23.2 m/km |
| Total descent | 33 m | 487 m |
| Net elevation | 1 m | 2 m |
| Max absolute grade | 2.4% | 18.1% |
| Flat grade share | 99.7% | 42.9% |
| GAP factor | 0.0% | 5.4% |
| Entry model | Open | Open |
| Entry fee | £46 | £46 |
| Lowest modelled true cost | £176 | £176 |
| Cost model origin | National Average | National Average |
| Measured course | Yes | Unavailable |
Schedule
- Bath & Bristol Railway Races Half Marathon
Exact race date not confirmed. Event weekend starts 2026-10-11 (legacy event-level date).
- Two Tunnels Railway Races Half Marathon
Exact race date not confirmed. Event weekend starts 2026-08-16 (legacy event-level date).
Location
- Bath & Bristol Railway Races Half Marathon
- Bath, South West
- Two Tunnels Railway Races Half Marathon
- Bath, South West
Actual distance
- Bath & Bristol Railway Races Half Marathon
- 21.1 km
- Two Tunnels Railway Races Half Marathon
- 21.1 km
raceindex.org mapped route held
- Bath & Bristol Railway Races Half Marathon
- Held
- Two Tunnels Railway Races Half Marathon
- Held
raceindex.org elevation profile held
- Bath & Bristol Railway Races Half Marathon
- Held
- Two Tunnels Railway Races Half Marathon
- Held
Course type
- Bath & Bristol Railway Races Half Marathon
- Out And Back
- Two Tunnels Railway Races Half Marathon
- Unavailable
Surface
- Bath & Bristol Railway Races Half Marathon
- Essentially 100% tarmac, aside from a small amount of grass at the start and finish
- Two Tunnels Railway Races Half Marathon
- Unavailable
Terrain
- Bath & Bristol Railway Races Half Marathon
- Trail
- Two Tunnels Railway Races Half Marathon
- Trail
Scenery
- Bath & Bristol Railway Races Half Marathon
- Historic, Riverside, Countryside, City, Parkland
- Two Tunnels Railway Races Half Marathon
- Parkland, Countryside, Riverside, City, Historic, Forest
Atmosphere
- Bath & Bristol Railway Races Half Marathon
- Scenic Tour
- Two Tunnels Railway Races Half Marathon
- Scenic Tour, Community
Total ascent
- Bath & Bristol Railway Races Half Marathon
- 33 m
- Two Tunnels Railway Races Half Marathon
- 489 m
Climbing density
- Bath & Bristol Railway Races Half Marathon
- 1.6 m/km
- Two Tunnels Railway Races Half Marathon
- 23.2 m/km
Total descent
- Bath & Bristol Railway Races Half Marathon
- 33 m
- Two Tunnels Railway Races Half Marathon
- 487 m
Net elevation
- Bath & Bristol Railway Races Half Marathon
- 1 m
- Two Tunnels Railway Races Half Marathon
- 2 m
Max absolute grade
- Bath & Bristol Railway Races Half Marathon
- 2.4%
- Two Tunnels Railway Races Half Marathon
- 18.1%
Flat grade share
- Bath & Bristol Railway Races Half Marathon
- 99.7%
- Two Tunnels Railway Races Half Marathon
- 42.9%
GAP factor
- Bath & Bristol Railway Races Half Marathon
- 0.0%
- Two Tunnels Railway Races Half Marathon
- 5.4%
Entry model
- Bath & Bristol Railway Races Half Marathon
- Open
- Two Tunnels Railway Races Half Marathon
- Open
Entry fee
- Bath & Bristol Railway Races Half Marathon
- £46
- Two Tunnels Railway Races Half Marathon
- £46
Lowest modelled true cost
- Bath & Bristol Railway Races Half Marathon
- £176
- Two Tunnels Railway Races Half Marathon
- £176
Cost model origin
- Bath & Bristol Railway Races Half Marathon
- National Average
- Two Tunnels Railway Races Half Marathon
- National Average
Measured course
- Bath & Bristol Railway Races Half Marathon
- Yes
- Two Tunnels Railway Races Half Marathon
- 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, Bath & Bristol Railway Races Half Marathon or Two Tunnels Railway Races Half Marathon?
Bath & Bristol Railway Races Half Marathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.