Flat grade share
- Mizuno Swansea Half Marathon
- 96.0% Favoured
Endurancelife Pembrokeshire Half Marathon vs Mizuno Swansea Half Marathon
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofEndurancelife Pembrokeshire Half Marathon or Mizuno Swansea Half Marathon — which comes out ahead?
Endurancelife Pembrokeshire Half Marathon and Mizuno Swansea Half Marathon split the available advantages, so the better choice depends on which metric matters most to the runner.
Route comparison snapshot
Endurancelife Pembrokeshire Half Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 6.0%
- flat grade share
- 25.5%
- lower ascent
- 570 m
- climbing density
- 26.4 m/km
- net elevation
- -11 m
- maximum grade
- 28.9%
Mizuno Swansea Half Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.1% Favoured
- flat grade share
- 96.0% Favoured
- lower ascent
- 44 m
- climbing density
- 2.1 m/km
- net elevation
- -0 m
- maximum grade
- 5.6%
| Metric | Endurancelife Pembrokeshire Half Marathon | Mizuno Swansea Half Marathon |
|---|---|---|
| Flat grade share | 25.5% | 96.0% ✓ |
| GAP factor (% slower than flat) | 6.0% | 0.1% ✓ |
| Uphill share | 36.0% | 2.0% |
| Steep-up share | 17.8% | 0.0% |
| Downhill share | 38.6% | 2.0% |
| Total ascent (m) | 570 m | 44 m |
| Climbing density (m/km) | 26.4 m/km | 2.1 m/km |
| Longest climb length (m) | 280 m | 410 m |
| Longest climb gain (m) | 29 m | 9 m |
| Longest climb average grade | 10.3% | 2.3% |
| Total descent (m) | 581 m | 44 m |
| Net elevation (m) | -11 m | -0 m |
| Max absolute grade | 28.9% | 5.6% |
| Start elevation (m) | 45 m | 8 m |
| Finish elevation (m) | 35 m | 8 m |
| Scenic score | 100/100 ✓ | 61/100 |
| Conditions | 84/100 ✓ | 77/100 |
GAP factor (% slower than flat)
- Mizuno Swansea Half Marathon
- 0.1% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
- Mizuno Swansea Half Marathon
- 2.1 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
- Endurancelife Pembrokeshire Half Marathon
- 100/100 Favoured
Conditions
- Endurancelife Pembrokeshire Half Marathon
- 84/100 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 | Endurancelife Pembrokeshire Half Marathon | Mizuno Swansea Half Marathon |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-04-25 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2027-03-21 (legacy event-level date). |
| Location | Little Haven, Wales | Swansea, Wales |
| Actual distance | 21.6 km | 21.1 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Unavailable | Loop |
| Surface | Grass, trail, beach and coast path | Unavailable |
| Elevation character | Unavailable | Pancake Flat |
| Terrain | Trail, Beach, Road | Road |
| Scenery | Coastal, Parkland, Desert, Island, Countryside | Coastal, City, Waterfront, Historic |
| Atmosphere | Wilderness, Scenic Tour, Community | Scenic Tour, Community |
| Technicality | Unavailable | Non Technical |
| Total ascent | 570 m | 44 m |
| Climbing density | 26.4 m/km | 2.1 m/km |
| Total descent | 581 m | 44 m |
| Net elevation | -11 m | -0 m |
| Max absolute grade | 28.9% | 5.6% |
| Flat grade share | 25.5% | 96.0% |
| GAP factor | 6.0% | 0.1% |
| Cutoff | Unavailable | 4:00:00 |
| Entry model | Open | Open |
| Measured course | Unavailable | Yes |
Schedule
- Endurancelife Pembrokeshire Half Marathon
Exact race date not confirmed. Event weekend starts 2026-04-25 (legacy event-level date).
- Mizuno Swansea Half Marathon
Exact race date not confirmed. Event weekend starts 2027-03-21 (legacy event-level date).
Location
- Endurancelife Pembrokeshire Half Marathon
- Little Haven, Wales
- Mizuno Swansea Half Marathon
- Swansea, Wales
Actual distance
- Endurancelife Pembrokeshire Half Marathon
- 21.6 km
- Mizuno Swansea Half Marathon
- 21.1 km
raceindex.org mapped route held
- Endurancelife Pembrokeshire Half Marathon
- Held
- Mizuno Swansea Half Marathon
- Held
raceindex.org elevation profile held
- Endurancelife Pembrokeshire Half Marathon
- Held
- Mizuno Swansea Half Marathon
- Held
Course type
- Endurancelife Pembrokeshire Half Marathon
- Unavailable
- Mizuno Swansea Half Marathon
- Loop
Surface
- Endurancelife Pembrokeshire Half Marathon
- Grass, trail, beach and coast path
- Mizuno Swansea Half Marathon
- Unavailable
Elevation character
- Endurancelife Pembrokeshire Half Marathon
- Unavailable
- Mizuno Swansea Half Marathon
- Pancake Flat
Terrain
- Endurancelife Pembrokeshire Half Marathon
- Trail, Beach, Road
- Mizuno Swansea Half Marathon
- Road
Scenery
- Endurancelife Pembrokeshire Half Marathon
- Coastal, Parkland, Desert, Island, Countryside
- Mizuno Swansea Half Marathon
- Coastal, City, Waterfront, Historic
Atmosphere
- Endurancelife Pembrokeshire Half Marathon
- Wilderness, Scenic Tour, Community
- Mizuno Swansea Half Marathon
- Scenic Tour, Community
Technicality
- Endurancelife Pembrokeshire Half Marathon
- Unavailable
- Mizuno Swansea Half Marathon
- Non Technical
Total ascent
- Endurancelife Pembrokeshire Half Marathon
- 570 m
- Mizuno Swansea Half Marathon
- 44 m
Climbing density
- Endurancelife Pembrokeshire Half Marathon
- 26.4 m/km
- Mizuno Swansea Half Marathon
- 2.1 m/km
Total descent
- Endurancelife Pembrokeshire Half Marathon
- 581 m
- Mizuno Swansea Half Marathon
- 44 m
Net elevation
- Endurancelife Pembrokeshire Half Marathon
- -11 m
- Mizuno Swansea Half Marathon
- -0 m
Max absolute grade
- Endurancelife Pembrokeshire Half Marathon
- 28.9%
- Mizuno Swansea Half Marathon
- 5.6%
Flat grade share
- Endurancelife Pembrokeshire Half Marathon
- 25.5%
- Mizuno Swansea Half Marathon
- 96.0%
GAP factor
- Endurancelife Pembrokeshire Half Marathon
- 6.0%
- Mizuno Swansea Half Marathon
- 0.1%
Cutoff
- Endurancelife Pembrokeshire Half Marathon
- Unavailable
- Mizuno Swansea Half Marathon
- 4:00:00
Entry model
- Endurancelife Pembrokeshire Half Marathon
- Open
- Mizuno Swansea Half Marathon
- Open
Measured course
- Endurancelife Pembrokeshire Half Marathon
- Unavailable
- Mizuno Swansea 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, Endurancelife Pembrokeshire Half Marathon or Mizuno Swansea Half Marathon?
Mizuno Swansea Half Marathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.