Flat grade share
- Two Tunnels Railway Races Marathon
- 71.5% Favoured
Two Tunnels Railway Races 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 ofTwo Tunnels Railway Races Marathon or Two Tunnels Railway Races Half Marathon — which comes out ahead?
Two Tunnels Railway Races Half Marathon has the stronger available profile on value score, entry fee and modelled total cost.
Route comparison snapshot
Two Tunnels Railway Races Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 2.0% Favoured
- flat grade share
- 71.5% Favoured
- lower ascent
- 415 m
- climbing density
- 9.8 m/km
- net elevation
- 2 m
- maximum grade
- 21.0%
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 | Two Tunnels Railway Races Marathon | Two Tunnels Railway Races Half Marathon |
|---|---|---|
| Flat grade share | 71.5% ✓ | 42.9% |
| GAP factor (% slower than flat) | 2.0% ✓ | 5.4% |
| Uphill share | 16.6% | 28.5% |
| Steep-up share | 5.7% | 14.9% |
| Downhill share | 11.9% | 28.6% |
| Total ascent (m) | 415 m | 489 m |
| Climbing density (m/km) | 9.8 m/km | 23.2 m/km |
| Longest climb length (m) | 1,920 m | 1,840 m |
| Longest climb gain (m) | 99 m | 110 m |
| Longest climb average grade | 5.1% | 6.0% |
| Total descent (m) | 413 m | 487 m |
| Net elevation (m) | 2 m | 2 m |
| Max absolute grade | 21.0% | 18.1% |
| Start elevation (m) | 41 m | 41 m |
| Finish elevation (m) | 43 m | 43 m |
| Value | 79/100 | 82/100 ✓ |
| Scenic score | 77/100 | 77/100 |
| Conditions | 62/100 | 62/100 |
| Entry fee (GBP) | £60 | £46 ✓ |
| Lowest modelled true cost (GBP) | £190 | £176 ✓ |
GAP factor (% slower than flat)
- Two Tunnels Railway Races Marathon
- 2.0% 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
- Two Tunnels Railway Races Half Marathon
- 82/100 Favoured
Scenic score
Conditions
Entry fee (GBP)
- Two Tunnels Railway Races Half Marathon
- £46 Favoured
Lowest modelled true cost (GBP)
- Two Tunnels Railway Races Half Marathon
- £176 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.
Same-distance comparisons are most meaningful; cross-distance metrics are contextual.
Race facts that change the decision
| Fact | Two Tunnels Railway Races Marathon | Two Tunnels Railway Races Half Marathon |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-08-16 (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 | 42.2 km | 21.1 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Laps | 2 | Unavailable |
| Elevation character | Gently Rolling | Unavailable |
| Terrain | Mixed, Towpath, Trail | Trail |
| Scenery | Parkland, Countryside, Riverside, City, Historic, Forest | Parkland, Countryside, Riverside, City, Historic, Forest |
| Atmosphere | Scenic Tour, Community | Scenic Tour, Community |
| Technicality | Non Technical | Unavailable |
| Total ascent | 415 m | 489 m |
| Climbing density | 9.8 m/km | 23.2 m/km |
| Total descent | 413 m | 487 m |
| Net elevation | 2 m | 2 m |
| Max absolute grade | 21.0% | 18.1% |
| Flat grade share | 71.5% | 42.9% |
| GAP factor | 2.0% | 5.4% |
| Entry model | Open | Open |
| Entry fee | £60 | £46 |
| Lowest modelled true cost | £190 | £176 |
| Cost model origin | National Average | National Average |
Schedule
- Two Tunnels Railway Races Marathon
Exact race date not confirmed. Event weekend starts 2026-08-16 (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
- Two Tunnels Railway Races Marathon
- Bath, South West
- Two Tunnels Railway Races Half Marathon
- Bath, South West
Actual distance
- Two Tunnels Railway Races Marathon
- 42.2 km
- Two Tunnels Railway Races Half Marathon
- 21.1 km
raceindex.org mapped route held
- Two Tunnels Railway Races Marathon
- Held
- Two Tunnels Railway Races Half Marathon
- Held
raceindex.org elevation profile held
- Two Tunnels Railway Races Marathon
- Held
- Two Tunnels Railway Races Half Marathon
- Held
Laps
- Two Tunnels Railway Races Marathon
- 2
- Two Tunnels Railway Races Half Marathon
- Unavailable
Elevation character
- Two Tunnels Railway Races Marathon
- Gently Rolling
- Two Tunnels Railway Races Half Marathon
- Unavailable
Terrain
- Two Tunnels Railway Races Marathon
- Mixed, Towpath, Trail
- Two Tunnels Railway Races Half Marathon
- Trail
Scenery
- Two Tunnels Railway Races Marathon
- Parkland, Countryside, Riverside, City, Historic, Forest
- Two Tunnels Railway Races Half Marathon
- Parkland, Countryside, Riverside, City, Historic, Forest
Atmosphere
- Two Tunnels Railway Races Marathon
- Scenic Tour, Community
- Two Tunnels Railway Races Half Marathon
- Scenic Tour, Community
Technicality
- Two Tunnels Railway Races Marathon
- Non Technical
- Two Tunnels Railway Races Half Marathon
- Unavailable
Total ascent
- Two Tunnels Railway Races Marathon
- 415 m
- Two Tunnels Railway Races Half Marathon
- 489 m
Climbing density
- Two Tunnels Railway Races Marathon
- 9.8 m/km
- Two Tunnels Railway Races Half Marathon
- 23.2 m/km
Total descent
- Two Tunnels Railway Races Marathon
- 413 m
- Two Tunnels Railway Races Half Marathon
- 487 m
Net elevation
- Two Tunnels Railway Races Marathon
- 2 m
- Two Tunnels Railway Races Half Marathon
- 2 m
Max absolute grade
- Two Tunnels Railway Races Marathon
- 21.0%
- Two Tunnels Railway Races Half Marathon
- 18.1%
Flat grade share
- Two Tunnels Railway Races Marathon
- 71.5%
- Two Tunnels Railway Races Half Marathon
- 42.9%
GAP factor
- Two Tunnels Railway Races Marathon
- 2.0%
- Two Tunnels Railway Races Half Marathon
- 5.4%
Entry model
- Two Tunnels Railway Races Marathon
- Open
- Two Tunnels Railway Races Half Marathon
- Open
Entry fee
- Two Tunnels Railway Races Marathon
- £60
- Two Tunnels Railway Races Half Marathon
- £46
Lowest modelled true cost
- Two Tunnels Railway Races Marathon
- £190
- Two Tunnels Railway Races Half Marathon
- £176
Cost model origin
- Two Tunnels Railway Races Marathon
- National Average
- Two Tunnels Railway Races Half Marathon
- National Average
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, Two Tunnels Railway Races Marathon or Two Tunnels Railway Races Half Marathon?
Two Tunnels Railway Races Marathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.