Flat grade share
- The Doncaster City 10K
- 89.9% Favoured
Two Tunnels Railway Races 10K vs The Doncaster City 10K
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 10K or The Doncaster City 10K — which comes out ahead?
The Doncaster City 10K has the stronger available profile on flat grade share, course flatness and value score.
Route comparison snapshot
Two Tunnels Railway Races 10K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 5.8%
- flat grade share
- 39.0%
- lower ascent
- 244 m
- climbing density
- 24.4 m/km
- net elevation
- 2 m
- maximum grade
- 18.1%
The Doncaster City 10K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.2% Favoured
- flat grade share
- 89.9% Favoured
- lower ascent
- 42 m
- climbing density
- 4.2 m/km
- net elevation
- 0 m
- maximum grade
- 5.0%
| Metric | Two Tunnels Railway Races 10K | The Doncaster City 10K |
|---|---|---|
| Flat grade share | 39.0% | 89.9% ✓ |
| GAP factor (% slower than flat) | 5.8% | 0.2% ✓ |
| Uphill share | 31.0% | 4.7% |
| Steep-up share | 16.4% | 0.0% |
| Downhill share | 30.0% | 5.4% |
| Total ascent (m) | 244 m | 42 m |
| Climbing density (m/km) | 24.4 m/km | 4.2 m/km |
| Longest climb length (m) | 1,520 m | 320 m |
| Longest climb gain (m) | 108 m | 6 m |
| Longest climb average grade | 7.1% | 1.7% |
| Total descent (m) | 241 m | 41 m |
| Net elevation (m) | 2 m | 0 m |
| Max absolute grade | 18.1% | 5.0% |
| Start elevation (m) | 41 m | 13 m |
| Finish elevation (m) | 43 m | 13 m |
| Value | 84/100 | 85/100 ✓ |
| Scenic score | 77/100 ✓ | 59/100 |
| Conditions | 62/100 | 80/100 ✓ |
| Entry fee (GBP) | £32 | £29 ✓ |
| Lowest modelled true cost (GBP) | £162 | £159 ✓ |
GAP factor (% slower than flat)
- The Doncaster City 10K
- 0.2% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
- Two Tunnels Railway Races 10K
- 24.4 m/km
- The Doncaster City 10K
- 4.2 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
- The Doncaster City 10K
- 85/100 Favoured
Scenic score
- Two Tunnels Railway Races 10K
- 77/100 Favoured
- The Doncaster City 10K
- 59/100
Conditions
- The Doncaster City 10K
- 80/100 Favoured
Entry fee (GBP)
- The Doncaster City 10K
- £29 Favoured
Lowest modelled true cost (GBP)
- The Doncaster City 10K
- £159 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.
Race facts that change the decision
| Fact | Two Tunnels Railway Races 10K | The Doncaster City 10K |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-08-16 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-11-29 (legacy event-level date). |
| Location | Bath, South West | Doncaster, Yorkshire |
| Actual distance | 10 km | 10 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Surface | Unavailable | Road |
| Elevation character | Flat | Flat |
| Terrain | Road, Trail | Road |
| Scenery | Parkland, Countryside, Riverside, City, Historic, Forest | City, Parkland, Forest, Riverside |
| Atmosphere | Scenic Tour, Community | Community, Festival, Competitive |
| Technicality | Unavailable | Non Technical |
| Total ascent | 244 m | 42 m |
| Climbing density | 24.4 m/km | 4.2 m/km |
| Total descent | 241 m | 41 m |
| Net elevation | 2 m | 0 m |
| Max absolute grade | 18.1% | 5.0% |
| Flat grade share | 39.0% | 89.9% |
| GAP factor | 5.8% | 0.2% |
| Field cap | Unavailable | 3,500 |
| Entry model | Open | Open |
| Entry fee | £32 | £29 |
| Lowest modelled true cost | £162 | £159 |
| Cost model origin | National Average | National Average |
| Measured course | Yes | Unavailable |
Schedule
- Two Tunnels Railway Races 10K
Exact race date not confirmed. Event weekend starts 2026-08-16 (legacy event-level date).
- The Doncaster City 10K
Exact race date not confirmed. Event weekend starts 2026-11-29 (legacy event-level date).
Location
- Two Tunnels Railway Races 10K
- Bath, South West
- The Doncaster City 10K
- Doncaster, Yorkshire
Actual distance
- Two Tunnels Railway Races 10K
- 10 km
- The Doncaster City 10K
- 10 km
raceindex.org mapped route held
- Two Tunnels Railway Races 10K
- Held
- The Doncaster City 10K
- Held
raceindex.org elevation profile held
- Two Tunnels Railway Races 10K
- Held
- The Doncaster City 10K
- Held
Surface
- Two Tunnels Railway Races 10K
- Unavailable
- The Doncaster City 10K
- Road
Elevation character
- Two Tunnels Railway Races 10K
- Flat
- The Doncaster City 10K
- Flat
Terrain
- Two Tunnels Railway Races 10K
- Road, Trail
- The Doncaster City 10K
- Road
Scenery
- Two Tunnels Railway Races 10K
- Parkland, Countryside, Riverside, City, Historic, Forest
- The Doncaster City 10K
- City, Parkland, Forest, Riverside
Atmosphere
- Two Tunnels Railway Races 10K
- Scenic Tour, Community
- The Doncaster City 10K
- Community, Festival, Competitive
Technicality
- Two Tunnels Railway Races 10K
- Unavailable
- The Doncaster City 10K
- Non Technical
Total ascent
- Two Tunnels Railway Races 10K
- 244 m
- The Doncaster City 10K
- 42 m
Climbing density
- Two Tunnels Railway Races 10K
- 24.4 m/km
- The Doncaster City 10K
- 4.2 m/km
Total descent
- Two Tunnels Railway Races 10K
- 241 m
- The Doncaster City 10K
- 41 m
Net elevation
- Two Tunnels Railway Races 10K
- 2 m
- The Doncaster City 10K
- 0 m
Max absolute grade
- Two Tunnels Railway Races 10K
- 18.1%
- The Doncaster City 10K
- 5.0%
Flat grade share
- Two Tunnels Railway Races 10K
- 39.0%
- The Doncaster City 10K
- 89.9%
GAP factor
- Two Tunnels Railway Races 10K
- 5.8%
- The Doncaster City 10K
- 0.2%
Field cap
- Two Tunnels Railway Races 10K
- Unavailable
- The Doncaster City 10K
- 3,500
Entry model
- Two Tunnels Railway Races 10K
- Open
- The Doncaster City 10K
- Open
Entry fee
- Two Tunnels Railway Races 10K
- £32
- The Doncaster City 10K
- £29
Lowest modelled true cost
- Two Tunnels Railway Races 10K
- £162
- The Doncaster City 10K
- £159
Cost model origin
- Two Tunnels Railway Races 10K
- National Average
- The Doncaster City 10K
- National Average
Measured course
- Two Tunnels Railway Races 10K
- Yes
- The Doncaster City 10K
- 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, Two Tunnels Railway Races 10K or The Doncaster City 10K?
The Doncaster City 10K has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.