Flat grade share
- Portland Coastal Marathon Half Marathon
- 52.2% Favoured
Portland Coastal Marathon 10K vs Portland Coastal Marathon Half 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 10K or Portland Coastal Marathon Half Marathon — which comes out ahead?
Portland Coastal Marathon Half Marathon has the stronger available profile on flat grade share and course flatness.
Route comparison snapshot
Portland Coastal Marathon 10K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 4.8%
- flat grade share
- 39.6%
- lower ascent
- 207 m
- climbing density
- 20.7 m/km
- net elevation
- -0 m
- maximum grade
- 22.0%
Portland Coastal Marathon Half Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 4.3% Favoured
- flat grade share
- 52.2% Favoured
- lower ascent
- 364 m
- climbing density
- 17.3 m/km
- net elevation
- 0 m
- maximum grade
- 33.5%
| Metric | Portland Coastal Marathon 10K | Portland Coastal Marathon Half Marathon |
|---|---|---|
| Flat grade share | 39.6% | 52.2% ✓ |
| GAP factor (% slower than flat) | 4.8% | 4.3% ✓ |
| Uphill share | 31.2% | 25.0% |
| Steep-up share | 11.5% | 9.2% |
| Downhill share | 29.2% | 22.7% |
| Total ascent (m) | 207 m | 364 m |
| Climbing density (m/km) | 20.7 m/km | 17.3 m/km |
| Longest climb length (m) | 840 m | 1,160 m |
| Longest climb gain (m) | 85 m | 94 m |
| Longest climb average grade | 10.1% | 8.1% |
| Total descent (m) | 208 m | 363 m |
| Net elevation (m) | -0 m | 0 m |
| Max absolute grade | 22.0% | 33.5% |
| 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 Half Marathon
- 4.3% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
- Portland Coastal Marathon 10K
- 20.7 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 10K | Portland Coastal Marathon Half 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 | 10 km | 21.1 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). |
| Terrain | Trail | Trail |
| Scenery | Island, Coastal, Waterfront, City, Historic | Island, Coastal, Waterfront, City, Historic |
| Atmosphere | Scenic Tour, Wilderness | Scenic Tour, Wilderness |
| Total ascent | 207 m | 364 m |
| Climbing density | 20.7 m/km | 17.3 m/km |
| Total descent | 208 m | 363 m |
| Net elevation | -0 m | 0 m |
| Max absolute grade | 22.0% | 33.5% |
| Flat grade share | 39.6% | 52.2% |
| GAP factor | 4.8% | 4.3% |
| Entry model | Open | Open |
| Measured course | No | No |
Schedule
- Portland Coastal Marathon 10K
Exact race date not confirmed. Event weekend starts 2027-02-14 (legacy event-level date).
- Portland Coastal Marathon Half Marathon
Exact race date not confirmed. Event weekend starts 2027-02-14 (legacy event-level date).
Location
- Portland Coastal Marathon 10K
- Portland, South West
- Portland Coastal Marathon Half Marathon
- Portland, South West
Actual distance
- Portland Coastal Marathon 10K
- 10 km
- Portland Coastal Marathon Half Marathon
- 21.1 km
raceindex.org mapped route held
- Portland Coastal Marathon 10K
- Held
- Portland Coastal Marathon Half Marathon
- Held
raceindex.org elevation profile held
- Portland Coastal Marathon 10K
- Held
- Portland Coastal Marathon Half Marathon
- Held
Course type
- Portland Coastal Marathon 10K
- Laps
- Portland Coastal Marathon Half Marathon
- Laps
Surface
- Portland Coastal Marathon 10K
- Coastal trail on the South West Coast Path (exposed limestone peninsula terrain).
- Portland Coastal Marathon Half Marathon
- Coastal trail on the South West Coast Path (exposed limestone peninsula terrain).
Terrain
- Portland Coastal Marathon 10K
- Trail
- Portland Coastal Marathon Half Marathon
- Trail
Scenery
- Portland Coastal Marathon 10K
- Island, Coastal, Waterfront, City, Historic
- Portland Coastal Marathon Half Marathon
- Island, Coastal, Waterfront, City, Historic
Atmosphere
- Portland Coastal Marathon 10K
- Scenic Tour, Wilderness
- Portland Coastal Marathon Half Marathon
- Scenic Tour, Wilderness
Total ascent
- Portland Coastal Marathon 10K
- 207 m
- Portland Coastal Marathon Half Marathon
- 364 m
Climbing density
- Portland Coastal Marathon 10K
- 20.7 m/km
- Portland Coastal Marathon Half Marathon
- 17.3 m/km
Total descent
- Portland Coastal Marathon 10K
- 208 m
- Portland Coastal Marathon Half Marathon
- 363 m
Net elevation
- Portland Coastal Marathon 10K
- -0 m
- Portland Coastal Marathon Half Marathon
- 0 m
Max absolute grade
- Portland Coastal Marathon 10K
- 22.0%
- Portland Coastal Marathon Half Marathon
- 33.5%
Flat grade share
- Portland Coastal Marathon 10K
- 39.6%
- Portland Coastal Marathon Half Marathon
- 52.2%
GAP factor
- Portland Coastal Marathon 10K
- 4.8%
- Portland Coastal Marathon Half Marathon
- 4.3%
Entry model
- Portland Coastal Marathon 10K
- Open
- Portland Coastal Marathon Half Marathon
- Open
Measured course
- Portland Coastal Marathon 10K
- No
- Portland Coastal Marathon Half 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 10K or Portland Coastal Marathon Half Marathon?
Portland Coastal Marathon Half Marathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.