Flat grade share
- Snowdonia Marathon
- 40.9% Favoured
Endurancelife Pembrokeshire Marathon vs Snowdonia Marathon
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofEndurancelife Pembrokeshire Marathon or Snowdonia Marathon — which comes out ahead?
Endurancelife Pembrokeshire Marathon and Snowdonia Marathon split the available advantages, so the better choice depends on which metric matters most to the runner.
Route comparison snapshot
Endurancelife Pembrokeshire Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 5.3%
- flat grade share
- 32.7%
- lower ascent
- 1,015 m
- climbing density
- 23.1 m/km
- net elevation
- -0 m
- maximum grade
- 28.8%
Snowdonia Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 3.3% Favoured
- flat grade share
- 40.9% Favoured
- lower ascent
- 786 m
- climbing density
- 18.6 m/km
- net elevation
- -15 m
- maximum grade
- 25.2%
| Metric | Endurancelife Pembrokeshire Marathon | Snowdonia Marathon |
|---|---|---|
| Flat grade share | 32.7% | 40.9% ✓ |
| GAP factor (% slower than flat) | 5.3% | 3.3% ✓ |
| Uphill share | 34.7% | 31.4% |
| Steep-up share | 13.7% | 11.4% |
| Downhill share | 32.6% | 27.7% |
| Total ascent (m) | 1,015 m | 786 m |
| Climbing density (m/km) | 23.1 m/km | 18.6 m/km |
| Longest climb length (m) | 890 m | 3,560 m |
| Longest climb gain (m) | 48 m | 242 m |
| Longest climb average grade | 5.4% | 6.8% |
| Total descent (m) | 1,015 m | 801 m |
| Net elevation (m) | -0 m | -15 m |
| Max absolute grade | 28.8% | 25.2% |
| Start elevation (m) | 33 m | 124 m |
| Finish elevation (m) | 33 m | 110 m |
| Scenic score | 100/100 ✓ | 73/100 |
| Conditions | 84/100 ✓ | 69/100 |
GAP factor (% slower than flat)
- Snowdonia Marathon
- 3.3% Favoured
Uphill share
- Snowdonia Marathon
- 31.4%
Steep-up share
- Snowdonia Marathon
- 11.4%
Downhill share
- Snowdonia Marathon
- 27.7%
Total ascent (m)
- Snowdonia Marathon
- 786 m
Climbing density (m/km)
- Endurancelife Pembrokeshire Marathon
- 23.1 m/km
- Snowdonia Marathon
- 18.6 m/km
Longest climb length (m)
- Snowdonia Marathon
- 3,560 m
Longest climb gain (m)
- Snowdonia Marathon
- 242 m
Longest climb average grade
Total descent (m)
- Snowdonia Marathon
- 801 m
Net elevation (m)
- Snowdonia Marathon
- -15 m
Max absolute grade
- Snowdonia Marathon
- 25.2%
Start elevation (m)
- Snowdonia Marathon
- 124 m
Finish elevation (m)
- Snowdonia Marathon
- 110 m
Scenic score
- Endurancelife Pembrokeshire Marathon
- 100/100 Favoured
- Snowdonia Marathon
- 73/100
Conditions
- Endurancelife Pembrokeshire Marathon
- 84/100 Favoured
- Snowdonia Marathon
- 69/100
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 Marathon | Snowdonia 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 2026-10-24 (legacy event-level date). |
| Location | Little Haven, Wales | Llanberis, Wales |
| Actual distance | 43.9 km | 42.2 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 | Hilly | Mountainous |
| Terrain | Trail, Beach, Road | Road, Mixed |
| Scenery | Coastal, Parkland, Desert, Island, Countryside | Mountain, Parkland, Lakeside, Countryside |
| Atmosphere | Wilderness, Scenic Tour, Community | Scenic Tour, Competitive, Destination |
| Technicality | Moderate | Moderate |
| Total ascent | 1,015 m | 786 m |
| Climbing density | 23.1 m/km | 18.6 m/km |
| Total descent | 1,015 m | 801 m |
| Net elevation | -0 m | -15 m |
| Max absolute grade | 28.8% | 25.2% |
| Flat grade share | 32.7% | 40.9% |
| GAP factor | 5.3% | 3.3% |
| Entry model | Open | Ballot |
Schedule
- Endurancelife Pembrokeshire Marathon
Exact race date not confirmed. Event weekend starts 2026-04-25 (legacy event-level date).
- Snowdonia Marathon
Exact race date not confirmed. Event weekend starts 2026-10-24 (legacy event-level date).
Location
- Endurancelife Pembrokeshire Marathon
- Little Haven, Wales
- Snowdonia Marathon
- Llanberis, Wales
Actual distance
- Endurancelife Pembrokeshire Marathon
- 43.9 km
- Snowdonia Marathon
- 42.2 km
raceindex.org mapped route held
- Endurancelife Pembrokeshire Marathon
- Held
- Snowdonia Marathon
- Held
raceindex.org elevation profile held
- Endurancelife Pembrokeshire Marathon
- Held
- Snowdonia Marathon
- Held
Course type
- Endurancelife Pembrokeshire Marathon
- Unavailable
- Snowdonia Marathon
- Loop
Surface
- Endurancelife Pembrokeshire Marathon
- Grass, trail, beach and coast path
- Snowdonia Marathon
- Unavailable
Elevation character
- Endurancelife Pembrokeshire Marathon
- Hilly
- Snowdonia Marathon
- Mountainous
Terrain
- Endurancelife Pembrokeshire Marathon
- Trail, Beach, Road
- Snowdonia Marathon
- Road, Mixed
Scenery
- Endurancelife Pembrokeshire Marathon
- Coastal, Parkland, Desert, Island, Countryside
- Snowdonia Marathon
- Mountain, Parkland, Lakeside, Countryside
Atmosphere
- Endurancelife Pembrokeshire Marathon
- Wilderness, Scenic Tour, Community
- Snowdonia Marathon
- Scenic Tour, Competitive, Destination
Technicality
- Endurancelife Pembrokeshire Marathon
- Moderate
- Snowdonia Marathon
- Moderate
Total ascent
- Endurancelife Pembrokeshire Marathon
- 1,015 m
- Snowdonia Marathon
- 786 m
Climbing density
- Endurancelife Pembrokeshire Marathon
- 23.1 m/km
- Snowdonia Marathon
- 18.6 m/km
Total descent
- Endurancelife Pembrokeshire Marathon
- 1,015 m
- Snowdonia Marathon
- 801 m
Net elevation
- Endurancelife Pembrokeshire Marathon
- -0 m
- Snowdonia Marathon
- -15 m
Max absolute grade
- Endurancelife Pembrokeshire Marathon
- 28.8%
- Snowdonia Marathon
- 25.2%
Flat grade share
- Endurancelife Pembrokeshire Marathon
- 32.7%
- Snowdonia Marathon
- 40.9%
GAP factor
- Endurancelife Pembrokeshire Marathon
- 5.3%
- Snowdonia Marathon
- 3.3%
Entry model
- Endurancelife Pembrokeshire Marathon
- Open
- Snowdonia Marathon
- Ballot
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 Marathon or Snowdonia Marathon?
Snowdonia Marathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.