Flat grade share
- Portland Coastal Marathon
- 53.2% Favoured
Portland Coastal Marathon Half Marathon vs Portland Coastal Marathon
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofPortland Coastal Marathon Half Marathon or Portland Coastal Marathon — which comes out ahead?
Portland Coastal Marathon has the stronger available profile on flat grade share and course flatness.
Route comparison snapshot
Portland Coastal Marathon Half Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 4.3%
- flat grade share
- 52.2%
- lower ascent
- 364 m
- climbing density
- 17.3 m/km
- net elevation
- 0 m
- maximum grade
- 33.5%
Portland Coastal Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 4.0% Favoured
- flat grade share
- 53.2% Favoured
- lower ascent
- 715 m
- climbing density
- 16.9 m/km
- net elevation
- -0 m
- maximum grade
- 33.0%
| Metric | Portland Coastal Marathon Half Marathon | Portland Coastal Marathon |
|---|---|---|
| Flat grade share | 52.2% | 53.2% ✓ |
| GAP factor (% slower than flat) | 4.3% | 4.0% ✓ |
| Uphill share | 25.0% | 23.4% |
| Steep-up share | 9.2% | 8.6% |
| Downhill share | 22.7% | 23.5% |
| Total ascent (m) | 364 m | 715 m |
| Climbing density (m/km) | 17.3 m/km | 16.9 m/km |
| Longest climb length (m) | 1,160 m | 680 m |
| Longest climb gain (m) | 94 m | 99 m |
| Longest climb average grade | 8.1% | 14.6% |
| Total descent (m) | 363 m | 715 m |
| Net elevation (m) | 0 m | -0 m |
| Max absolute grade | 33.5% | 33.0% |
| Start elevation (m) | 0 m | -0 m |
| Finish elevation (m) | 0 m | -0 m |
| Scenic score | 87/100 | 87/100 |
| Conditions | 78/100 | 78/100 |
GAP factor (% slower than flat)
- Portland Coastal Marathon
- 4.0% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
- Portland Coastal Marathon
- 16.9 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
Conditions
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.
Same-distance comparisons are most meaningful; cross-distance metrics are contextual.
Race facts that change the decision
| Fact | Portland Coastal Marathon Half Marathon | Portland Coastal Marathon |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2027-02-14 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2027-02-14 (legacy event-level date). |
| Location | Portland, South West | Portland, South West |
| Actual distance | 21.1 km | 42.2 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Laps | Laps |
| Surface | Coastal trail on the South West Coast Path (exposed limestone peninsula terrain). | Coastal trail on the South West Coast Path (exposed limestone peninsula terrain). |
| Elevation character | Unavailable | Hilly |
| Terrain | Trail | Trail |
| Scenery | Island, Coastal, Waterfront, City, Historic | Island, Coastal, Waterfront, City, Historic |
| Atmosphere | Scenic Tour, Wilderness | Scenic Tour, Wilderness |
| Technicality | Unavailable | Moderate |
| Total ascent | 364 m | 715 m |
| Climbing density | 17.3 m/km | 16.9 m/km |
| Total descent | 363 m | 715 m |
| Net elevation | 0 m | -0 m |
| Max absolute grade | 33.5% | 33.0% |
| Flat grade share | 52.2% | 53.2% |
| GAP factor | 4.3% | 4.0% |
| Entry model | Open | Open |
| Measured course | No | No |
Schedule
- Portland Coastal Marathon Half Marathon
Exact race date not confirmed. Event weekend starts 2027-02-14 (legacy event-level date).
- Portland Coastal Marathon
Exact race date not confirmed. Event weekend starts 2027-02-14 (legacy event-level date).
Location
- Portland Coastal Marathon Half Marathon
- Portland, South West
- Portland Coastal Marathon
- Portland, South West
Actual distance
- Portland Coastal Marathon Half Marathon
- 21.1 km
- Portland Coastal Marathon
- 42.2 km
raceindex.org mapped route held
- Portland Coastal Marathon Half Marathon
- Held
- Portland Coastal Marathon
- Held
raceindex.org elevation profile held
- Portland Coastal Marathon Half Marathon
- Held
- Portland Coastal Marathon
- Held
Course type
- Portland Coastal Marathon Half Marathon
- Laps
- Portland Coastal Marathon
- Laps
Surface
- Portland Coastal Marathon Half Marathon
- Coastal trail on the South West Coast Path (exposed limestone peninsula terrain).
- Portland Coastal Marathon
- Coastal trail on the South West Coast Path (exposed limestone peninsula terrain).
Elevation character
- Portland Coastal Marathon Half Marathon
- Unavailable
- Portland Coastal Marathon
- Hilly
Terrain
- Portland Coastal Marathon Half Marathon
- Trail
- Portland Coastal Marathon
- Trail
Scenery
- Portland Coastal Marathon Half Marathon
- Island, Coastal, Waterfront, City, Historic
- Portland Coastal Marathon
- Island, Coastal, Waterfront, City, Historic
Atmosphere
- Portland Coastal Marathon Half Marathon
- Scenic Tour, Wilderness
- Portland Coastal Marathon
- Scenic Tour, Wilderness
Technicality
- Portland Coastal Marathon Half Marathon
- Unavailable
- Portland Coastal Marathon
- Moderate
Total ascent
- Portland Coastal Marathon Half Marathon
- 364 m
- Portland Coastal Marathon
- 715 m
Climbing density
- Portland Coastal Marathon Half Marathon
- 17.3 m/km
- Portland Coastal Marathon
- 16.9 m/km
Total descent
- Portland Coastal Marathon Half Marathon
- 363 m
- Portland Coastal Marathon
- 715 m
Net elevation
- Portland Coastal Marathon Half Marathon
- 0 m
- Portland Coastal Marathon
- -0 m
Max absolute grade
- Portland Coastal Marathon Half Marathon
- 33.5%
- Portland Coastal Marathon
- 33.0%
Flat grade share
- Portland Coastal Marathon Half Marathon
- 52.2%
- Portland Coastal Marathon
- 53.2%
GAP factor
- Portland Coastal Marathon Half Marathon
- 4.3%
- Portland Coastal Marathon
- 4.0%
Entry model
- Portland Coastal Marathon Half Marathon
- Open
- Portland Coastal Marathon
- Open
Measured course
- Portland Coastal Marathon Half Marathon
- No
- Portland Coastal Marathon
- No
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, Portland Coastal Marathon Half Marathon or Portland Coastal Marathon?
Portland Coastal Marathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.