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A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofSummer Breeze Half Marathon (San Leandro) 10K has the stronger available profile on course flatness.
| Metric | Summer Breeze Half Marathon (San Leandro) 10K | Summer Breeze Half Marathon (San Leandro) |
|---|---|---|
| Flat grade share | 100.0% | 100.0% |
| GAP factor (% slower than flat) | 0.0% ✓ | 0.0% |
| Uphill share | 0.0% | 0.0% |
| Steep-up share | 0.0% | 0.0% |
| Downhill share | 0.0% | 0.0% |
| Total ascent (m) | 0 m | 0 m |
| Climbing density (m/km) | 0.0 m/km | 0.0 m/km |
| Longest climb length (m) | 640 m | 330 m |
| Longest climb gain (m) | 1 m | 1 m |
| Longest climb average grade | 0.1% | 0.3% |
| Total descent (m) | 0 m | 0 m |
| Net elevation (m) | -0 m | -0 m |
| Max absolute grade | 1.7% | 1.8% |
| Start elevation (m) | 2 m | 2 m |
| Finish elevation (m) | 2 m | 2 m |
| Scenic score | 57/100 | 57/100 |
| Conditions | 73/100 | 73/100 |
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.
Same-distance comparisons are most meaningful; cross-distance metrics are contextual.
| Fact | Summer Breeze Half Marathon (San Leandro) 10K | Summer Breeze Half Marathon (San Leandro) |
|---|---|---|
| Race date | 2026-08-01 | 2026-08-01 |
| Location | San Leandro, California | San Leandro, California |
| Actual distance | 10 km | 21.1 km |
| RaceIndex mapped route held | Held | Held |
| RaceIndex elevation profile held | Held | Held |
| Course type | Out And Back | Out And Back |
| Surface | Paved bayside trail (Marina Bay Trail / San Leandro Marina shoreline path). | Paved bayside trail (Marina Bay Trail / San Leandro Marina shoreline path). |
| Elevation character | Unavailable | Pancake Flat |
| Terrain | Trail | Mixed, Trail |
| Scenery | Coastal, Waterfront, Parkland | Coastal, Waterfront, Parkland |
| Atmosphere | Community, Scenic Tour | Community, Scenic Tour |
| Technicality | Unavailable | Non Technical |
| Total ascent | 0 m | 0 m |
| Climbing density | 0.0 m/km | 0.0 m/km |
| Total descent | 0 m | 0 m |
| Net elevation | -0 m | -0 m |
| Max absolute grade | 1.7% | 1.8% |
| Flat grade share | 100.0% | 100.0% |
| GAP factor | 0.0% | 0.0% |
| Entry model | Open | Open |
Facts are shown only when they exist in the sourced race record; Not held means no sourced value is held for that race.
Summer Breeze Half Marathon (San Leandro) 10K has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.