Flat grade share
- Summer Breeze Half Marathon (San Leandro)
- 100.0% Favoured
Naturosa Catania Marathon Half Marathon vs Summer Breeze Half Marathon (San Leandro)
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofNaturosa Catania Marathon Half Marathon or Summer Breeze Half Marathon (San Leandro) — which comes out ahead?
Naturosa Catania Marathon Half Marathon and Summer Breeze Half Marathon (San Leandro) split the available advantages, so the better choice depends on which metric matters most to the runner.
Route comparison snapshot
Naturosa Catania Marathon Half Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.0%
- flat grade share
- 99.3%
- lower ascent
- 11 m
- climbing density
- 0.5 m/km
- net elevation
- -0 m
- maximum grade
- 3.1%
Summer Breeze Half Marathon (San Leandro)
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.0% Favoured
- flat grade share
- 100.0% Favoured
- lower ascent
- 0 m
- climbing density
- 0.0 m/km
- net elevation
- -0 m
- maximum grade
- 1.8%
| Metric | Naturosa Catania Marathon Half Marathon | Summer Breeze Half Marathon (San Leandro) |
|---|---|---|
| Flat grade share | 99.3% | 100.0% ✓ |
| GAP factor (% slower than flat) | 0.0% | 0.0% ✓ |
| Uphill share | 0.4% | 0.0% |
| Steep-up share | 0.0% | 0.0% |
| Downhill share | 0.3% | 0.0% |
| Total ascent (m) | 11 m | 0 m |
| Climbing density (m/km) | 0.5 m/km | 0.0 m/km |
| Longest climb length (m) | 330 m | 330 m |
| Longest climb gain (m) | 2 m | 1 m |
| Longest climb average grade | 0.6% | 0.3% |
| Total descent (m) | 12 m | 0 m |
| Net elevation (m) | -0 m | -0 m |
| Max absolute grade | 3.1% | 1.8% |
| Start elevation (m) | 4 m | 2 m |
| Finish elevation (m) | 4 m | 2 m |
| Scenic score | 57/100 ✓ | 57/100 |
| Conditions | 88/100 ✓ | 73/100 |
GAP factor (% slower than flat)
- Summer Breeze Half Marathon (San Leandro)
- 0.0% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (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
- Naturosa Catania Marathon Half Marathon
- 57/100 Favoured
Conditions
- Naturosa Catania Marathon Half Marathon
- 88/100 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 | Naturosa Catania Marathon Half Marathon | Summer Breeze Half Marathon (San Leandro) |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-12-13 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-08-01 (legacy event-level date). |
| Location | Catania, Italy | San Leandro, California |
| Actual distance | 21.1 km | 21.1 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Unavailable | Out And Back |
| Surface | Unavailable | Paved bayside trail (Marina Bay Trail / San Leandro Marina shoreline path). |
| Elevation character | Unavailable | Pancake Flat |
| Terrain | Unavailable | Mixed, Trail |
| Scenery | Coastal, City, Waterfront, Historic | Coastal, Waterfront, Parkland |
| Atmosphere | Scenic Tour, Festival, Big City | Community, Scenic Tour |
| Technicality | Unavailable | Non Technical |
| Total ascent | 11 m | 0 m |
| Climbing density | 0.5 m/km | 0.0 m/km |
| Total descent | 12 m | 0 m |
| Net elevation | -0 m | -0 m |
| Max absolute grade | 3.1% | 1.8% |
| Flat grade share | 99.3% | 100.0% |
| GAP factor | 0.0% | 0.0% |
| Entry model | Open | Open |
Schedule
- Naturosa Catania Marathon Half Marathon
Exact race date not confirmed. Event weekend starts 2026-12-13 (legacy event-level date).
- Summer Breeze Half Marathon (San Leandro)
Exact race date not confirmed. Event weekend starts 2026-08-01 (legacy event-level date).
Location
- Naturosa Catania Marathon Half Marathon
- Catania, Italy
- Summer Breeze Half Marathon (San Leandro)
- San Leandro, California
Actual distance
- Naturosa Catania Marathon Half Marathon
- 21.1 km
- Summer Breeze Half Marathon (San Leandro)
- 21.1 km
raceindex.org mapped route held
- Naturosa Catania Marathon Half Marathon
- Held
- Summer Breeze Half Marathon (San Leandro)
- Held
raceindex.org elevation profile held
- Naturosa Catania Marathon Half Marathon
- Held
- Summer Breeze Half Marathon (San Leandro)
- Held
Course type
- Naturosa Catania Marathon Half Marathon
- Unavailable
- Summer Breeze Half Marathon (San Leandro)
- Out And Back
Surface
- Naturosa Catania Marathon Half Marathon
- Unavailable
- Summer Breeze Half Marathon (San Leandro)
- Paved bayside trail (Marina Bay Trail / San Leandro Marina shoreline path).
Elevation character
- Naturosa Catania Marathon Half Marathon
- Unavailable
- Summer Breeze Half Marathon (San Leandro)
- Pancake Flat
Terrain
- Naturosa Catania Marathon Half Marathon
- Unavailable
- Summer Breeze Half Marathon (San Leandro)
- Mixed, Trail
Scenery
- Naturosa Catania Marathon Half Marathon
- Coastal, City, Waterfront, Historic
- Summer Breeze Half Marathon (San Leandro)
- Coastal, Waterfront, Parkland
Atmosphere
- Naturosa Catania Marathon Half Marathon
- Scenic Tour, Festival, Big City
- Summer Breeze Half Marathon (San Leandro)
- Community, Scenic Tour
Technicality
- Naturosa Catania Marathon Half Marathon
- Unavailable
- Summer Breeze Half Marathon (San Leandro)
- Non Technical
Total ascent
- Naturosa Catania Marathon Half Marathon
- 11 m
- Summer Breeze Half Marathon (San Leandro)
- 0 m
Climbing density
- Naturosa Catania Marathon Half Marathon
- 0.5 m/km
- Summer Breeze Half Marathon (San Leandro)
- 0.0 m/km
Total descent
- Naturosa Catania Marathon Half Marathon
- 12 m
- Summer Breeze Half Marathon (San Leandro)
- 0 m
Net elevation
- Naturosa Catania Marathon Half Marathon
- -0 m
- Summer Breeze Half Marathon (San Leandro)
- -0 m
Max absolute grade
- Naturosa Catania Marathon Half Marathon
- 3.1%
- Summer Breeze Half Marathon (San Leandro)
- 1.8%
Flat grade share
- Naturosa Catania Marathon Half Marathon
- 99.3%
- Summer Breeze Half Marathon (San Leandro)
- 100.0%
GAP factor
- Naturosa Catania Marathon Half Marathon
- 0.0%
- Summer Breeze Half Marathon (San Leandro)
- 0.0%
Entry model
- Naturosa Catania Marathon Half Marathon
- Open
- Summer Breeze Half Marathon (San Leandro)
- 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, Naturosa Catania Marathon Half Marathon or Summer Breeze Half Marathon (San Leandro)?
Summer Breeze Half Marathon (San Leandro) has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.