Flat grade share
- Southampton Marathon Half Marathon
- 76.6% Favoured
Southampton Marathon Half Marathon vs Milton Keynes Marathon Half Marathon
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofSouthampton Marathon Half Marathon or Milton Keynes Marathon Half Marathon — which comes out ahead?
Southampton Marathon Half Marathon has the stronger available profile on flat grade share, scenery score and conditions.
Route comparison snapshot
Southampton Marathon Half Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 1.0%
- flat grade share
- 76.6% Favoured
- lower ascent
- 151 m
- climbing density
- 7.1 m/km
- net elevation
- 15 m
- maximum grade
- 12.4%
Milton Keynes Marathon Half Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.5% Favoured
- flat grade share
- 67.0%
- lower ascent
- 162 m
- climbing density
- 7.7 m/km
- net elevation
- -3 m
- maximum grade
- 8.1%
| Metric | Southampton Marathon Half Marathon | Milton Keynes Marathon Half Marathon |
|---|---|---|
| Flat grade share | 76.6% ✓ | 67.0% |
| GAP factor (% slower than flat) | 1.0% | 0.5% ✓ |
| Uphill share | 13.2% | 16.2% |
| Steep-up share | 1.0% | 0.4% |
| Downhill share | 10.2% | 16.8% |
| Total ascent (m) | 151 m | 162 m |
| Climbing density (m/km) | 7.1 m/km | 7.7 m/km |
| Longest climb length (m) | 1,430 m | 420 m |
| Longest climb gain (m) | 42 m | 15 m |
| Longest climb average grade | 2.9% | 3.6% |
| Total descent (m) | 136 m | 165 m |
| Net elevation (m) | 15 m | -3 m |
| Max absolute grade | 12.4% | 8.1% |
| Start elevation (m) | 3 m | 78 m |
| Finish elevation (m) | 18 m | 75 m |
| Scenic score | 86/100 ✓ | 85/100 |
| Conditions | 87/100 ✓ | 86/100 |
GAP factor (% slower than flat)
- Milton Keynes Marathon Half Marathon
- 0.5% 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)
Scenic score
- Southampton Marathon Half Marathon
- 86/100 Favoured
Conditions
- Southampton Marathon Half Marathon
- 87/100 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 | Southampton Marathon Half Marathon | Milton Keynes Marathon Half Marathon |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2027-05-02 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-05-03 (legacy event-level date). |
| Location | Southampton, South East | Milton Keynes, Buckinghamshire, South East |
| Actual distance | 21.1 km | 21.1 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Scenery | City, Coastal, Historic, Parkland, Waterfront, Riverside | Parkland, Lakeside, Riverside, City, Forest, Countryside |
| Atmosphere | Big City, Festival, Community | Community, Destination |
| Total ascent | 151 m | 162 m |
| Climbing density | 7.1 m/km | 7.7 m/km |
| Total descent | 136 m | 165 m |
| Net elevation | 15 m | -3 m |
| Max absolute grade | 12.4% | 8.1% |
| Flat grade share | 76.6% | 67.0% |
| GAP factor | 1.0% | 0.5% |
| Cutoff | 6:00:00 | 3:30:00 |
| Entry model | Open | Open |
| Measured course | Yes | Yes |
Schedule
- Southampton Marathon Half Marathon
Exact race date not confirmed. Event weekend starts 2027-05-02 (legacy event-level date).
- Milton Keynes Marathon Half Marathon
Exact race date not confirmed. Event weekend starts 2026-05-03 (legacy event-level date).
Location
- Southampton Marathon Half Marathon
- Southampton, South East
- Milton Keynes Marathon Half Marathon
- Milton Keynes, Buckinghamshire, South East
Actual distance
- Southampton Marathon Half Marathon
- 21.1 km
- Milton Keynes Marathon Half Marathon
- 21.1 km
raceindex.org mapped route held
- Southampton Marathon Half Marathon
- Held
- Milton Keynes Marathon Half Marathon
- Held
raceindex.org elevation profile held
- Southampton Marathon Half Marathon
- Held
- Milton Keynes Marathon Half Marathon
- Held
Scenery
- Southampton Marathon Half Marathon
- City, Coastal, Historic, Parkland, Waterfront, Riverside
- Milton Keynes Marathon Half Marathon
- Parkland, Lakeside, Riverside, City, Forest, Countryside
Atmosphere
- Southampton Marathon Half Marathon
- Big City, Festival, Community
- Milton Keynes Marathon Half Marathon
- Community, Destination
Total ascent
- Southampton Marathon Half Marathon
- 151 m
- Milton Keynes Marathon Half Marathon
- 162 m
Climbing density
- Southampton Marathon Half Marathon
- 7.1 m/km
- Milton Keynes Marathon Half Marathon
- 7.7 m/km
Total descent
- Southampton Marathon Half Marathon
- 136 m
- Milton Keynes Marathon Half Marathon
- 165 m
Net elevation
- Southampton Marathon Half Marathon
- 15 m
- Milton Keynes Marathon Half Marathon
- -3 m
Max absolute grade
- Southampton Marathon Half Marathon
- 12.4%
- Milton Keynes Marathon Half Marathon
- 8.1%
Flat grade share
- Southampton Marathon Half Marathon
- 76.6%
- Milton Keynes Marathon Half Marathon
- 67.0%
GAP factor
- Southampton Marathon Half Marathon
- 1.0%
- Milton Keynes Marathon Half Marathon
- 0.5%
Cutoff
- Southampton Marathon Half Marathon
- 6:00:00
- Milton Keynes Marathon Half Marathon
- 3:30:00
Entry model
- Southampton Marathon Half Marathon
- Open
- Milton Keynes Marathon Half Marathon
- Open
Measured course
- Southampton Marathon Half Marathon
- Yes
- Milton Keynes Marathon Half Marathon
- 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, Southampton Marathon Half Marathon or Milton Keynes Marathon Half Marathon?
Milton Keynes Marathon Half Marathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.