Flat grade share
- Belfast City Marathon Half Marathon
- 90.1% Favoured
Belfast City Marathon Half Marathon vs Belfast City Half Marathon
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofBelfast City Marathon Half Marathon or Belfast City Half Marathon — which comes out ahead?
Belfast City Marathon Half Marathon has the stronger available profile on flat grade share, course flatness and value score.
Route comparison snapshot
Belfast City Marathon Half Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.2% Favoured
- flat grade share
- 90.1% Favoured
- lower ascent
- 75 m
- climbing density
- 3.6 m/km
- net elevation
- 0 m
- maximum grade
- 5.9%
Belfast City Half Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.2%
- flat grade share
- 89.0%
- lower ascent
- 88 m
- climbing density
- 4.2 m/km
- net elevation
- -0 m
- maximum grade
- 8.6%
| Metric | Belfast City Marathon Half Marathon | Belfast City Half Marathon |
|---|---|---|
| Flat grade share | 90.1% ✓ | 89.0% |
| GAP factor (% slower than flat) | 0.2% ✓ | 0.2% |
| Uphill share | 4.6% | 5.8% |
| Steep-up share | 0.0% | 0.0% |
| Downhill share | 5.2% | 5.2% |
| Total ascent (m) | 75 m | 88 m |
| Climbing density (m/km) | 3.6 m/km | 4.2 m/km |
| Longest climb length (m) | 1,020 m | 1,160 m |
| Longest climb gain (m) | 14 m | 13 m |
| Longest climb average grade | 1.4% | 1.1% |
| Total descent (m) | 75 m | 89 m |
| Net elevation (m) | 0 m | -0 m |
| Max absolute grade | 5.9% | 8.6% |
| Start elevation (m) | 2 m | 4 m |
| Finish elevation (m) | 2 m | 4 m |
| Value | 82/100 ✓ | 81/100 |
| Scenic score | 43/100 | 76/100 ✓ |
| Conditions | 86/100 ✓ | 81/100 |
| Entry fee (GBP) | £42 ✓ | £50 |
| Lowest modelled true cost (GBP) | £172 ✓ | £180 |
GAP factor (% slower than flat)
- Belfast City Marathon Half Marathon
- 0.2% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
- Belfast City Half Marathon
- 4.2 m/km
Longest climb length (m)
- Belfast City Half Marathon
- 1,160 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
- Belfast City Marathon Half Marathon
- 82/100 Favoured
Scenic score
- Belfast City Half Marathon
- 76/100 Favoured
Conditions
- Belfast City Marathon Half Marathon
- 86/100 Favoured
Entry fee (GBP)
- Belfast City Marathon Half Marathon
- £42 Favoured
Lowest modelled true cost (GBP)
- Belfast City Marathon Half Marathon
- £172 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 | Belfast City Marathon Half Marathon | Belfast City 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 2026-09-20 (legacy event-level date). |
| Location | Belfast, Northern Ireland | Belfast, Northern Ireland |
| Actual distance | 21.1 km | 21.1 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Unavailable | Loop |
| Elevation character | Unavailable | Flat |
| Terrain | Unavailable | Road |
| Scenery | City, Riverside, Parkland, Waterfront | City, Parkland, Waterfront, Riverside, Historic |
| Atmosphere | Big City, Community | Big City, Community, Scenic Tour |
| Technicality | Unavailable | Non Technical |
| Total ascent | 75 m | 88 m |
| Climbing density | 3.6 m/km | 4.2 m/km |
| Total descent | 75 m | 89 m |
| Net elevation | 0 m | -0 m |
| Max absolute grade | 5.9% | 8.6% |
| Flat grade share | 90.1% | 89.0% |
| GAP factor | 0.2% | 0.2% |
| Cutoff | 3:00:00 | 3:00:00 |
| Entry model | Open | Open |
| Entry fee | £42 | £50 |
| Lowest modelled true cost | £172 | £180 |
| Cost model origin | National Average | National Average |
Schedule
- Belfast City Marathon Half Marathon
Exact race date not confirmed. Event weekend starts 2027-05-02 (legacy event-level date).
- Belfast City Half Marathon
Exact race date not confirmed. Event weekend starts 2026-09-20 (legacy event-level date).
Location
- Belfast City Marathon Half Marathon
- Belfast, Northern Ireland
- Belfast City Half Marathon
- Belfast, Northern Ireland
Actual distance
- Belfast City Marathon Half Marathon
- 21.1 km
- Belfast City Half Marathon
- 21.1 km
raceindex.org mapped route held
- Belfast City Marathon Half Marathon
- Held
- Belfast City Half Marathon
- Held
raceindex.org elevation profile held
- Belfast City Marathon Half Marathon
- Held
- Belfast City Half Marathon
- Held
Course type
- Belfast City Marathon Half Marathon
- Unavailable
- Belfast City Half Marathon
- Loop
Elevation character
- Belfast City Marathon Half Marathon
- Unavailable
- Belfast City Half Marathon
- Flat
Terrain
- Belfast City Marathon Half Marathon
- Unavailable
- Belfast City Half Marathon
- Road
Scenery
- Belfast City Marathon Half Marathon
- City, Riverside, Parkland, Waterfront
- Belfast City Half Marathon
- City, Parkland, Waterfront, Riverside, Historic
Atmosphere
- Belfast City Marathon Half Marathon
- Big City, Community
- Belfast City Half Marathon
- Big City, Community, Scenic Tour
Technicality
- Belfast City Marathon Half Marathon
- Unavailable
- Belfast City Half Marathon
- Non Technical
Total ascent
- Belfast City Marathon Half Marathon
- 75 m
- Belfast City Half Marathon
- 88 m
Climbing density
- Belfast City Marathon Half Marathon
- 3.6 m/km
- Belfast City Half Marathon
- 4.2 m/km
Total descent
- Belfast City Marathon Half Marathon
- 75 m
- Belfast City Half Marathon
- 89 m
Net elevation
- Belfast City Marathon Half Marathon
- 0 m
- Belfast City Half Marathon
- -0 m
Max absolute grade
- Belfast City Marathon Half Marathon
- 5.9%
- Belfast City Half Marathon
- 8.6%
Flat grade share
- Belfast City Marathon Half Marathon
- 90.1%
- Belfast City Half Marathon
- 89.0%
GAP factor
- Belfast City Marathon Half Marathon
- 0.2%
- Belfast City Half Marathon
- 0.2%
Cutoff
- Belfast City Marathon Half Marathon
- 3:00:00
- Belfast City Half Marathon
- 3:00:00
Entry model
- Belfast City Marathon Half Marathon
- Open
- Belfast City Half Marathon
- Open
Entry fee
- Belfast City Marathon Half Marathon
- £42
- Belfast City Half Marathon
- £50
Lowest modelled true cost
- Belfast City Marathon Half Marathon
- £172
- Belfast City Half Marathon
- £180
Cost model origin
- Belfast City Marathon Half Marathon
- National Average
- Belfast City 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, Belfast City Marathon Half Marathon or Belfast City Half Marathon?
Belfast City Marathon Half Marathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.