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