Flat grade share
- Summer Breeze Half Marathon (San Leandro) 10K
- 100.0% Favoured
Summer Breeze Half Marathon (San Leandro) 10K vs Dalmacija Ultra Trail 10K
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 or Dalmacija Ultra Trail 10K — which comes out ahead?
Summer Breeze Half Marathon (San Leandro) 10K has the stronger available profile on flat grade share and conditions.
Route comparison snapshot
Summer Breeze Half Marathon (San Leandro) 10K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.0%
- flat grade share
- 100.0% Favoured
- lower ascent
- 0 m
- climbing density
- 0.0 m/km
- net elevation
- -0 m
- maximum grade
- 1.7%
Dalmacija Ultra Trail 10K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- Unavailable
- flat grade share
- 24.3%
- lower ascent
- 428 m
- climbing density
- 42.1 m/km
- net elevation
- 0 m
- maximum grade
- 48.6%
| Metric | Summer Breeze Half Marathon (San Leandro) 10K | Dalmacija Ultra Trail 10K |
|---|---|---|
| Flat grade share | 100.0% ✓ | 24.3% |
| GAP factor (% slower than flat) | 0.0% | Unavailable |
| Uphill share | 0.0% | 31.2% |
| Steep-up share | 0.0% | 22.9% |
| Downhill share | 0.0% | 44.5% |
| Total ascent (m) | 0 m | 428 m |
| Climbing density (m/km) | 0.0 m/km | 42.1 m/km |
| Longest climb length (m) | 640 m | 1,750 m |
| Longest climb gain (m) | 1 m | 284 m |
| Longest climb average grade | 0.1% | 16.2% |
| Total descent (m) | 0 m | 428 m |
| Net elevation (m) | -0 m | 0 m |
| Max absolute grade | 1.7% | 48.6% |
| Start elevation (m) | 2 m | 1 m |
| Finish elevation (m) | 2 m | 1 m |
| Scenic score | 57/100 | 100/100 ✓ |
| Conditions | 73/100 ✓ | 64/100 |
GAP factor (% slower than flat)
- Dalmacija Ultra Trail 10K
- Unavailable
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
- Dalmacija Ultra Trail 10K
- 42.1 m/km
Longest climb length (m)
- Dalmacija Ultra Trail 10K
- 1,750 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
- Dalmacija Ultra Trail 10K
- 100/100 Favoured
Conditions
- Summer Breeze Half Marathon (San Leandro) 10K
- 73/100 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 | Summer Breeze Half Marathon (San Leandro) 10K | Dalmacija Ultra Trail 10K |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-08-01 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-10-09 (legacy event-level date). |
| Location | San Leandro, California | Omiš, Croatia |
| Actual distance | 10 km | 10.2 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Out And Back | Point To Point |
| Surface | Paved bayside trail (Marina Bay Trail / San Leandro Marina shoreline path). | Mountain trail and rocky coastal paths |
| Elevation character | Unavailable | Hilly |
| Terrain | Trail | Beach, Trail |
| Scenery | Coastal, Waterfront, Parkland | Coastal, Riverside, City, Mountain, Forest, Canyon, Historic, Island, Waterfront |
| Atmosphere | Community, Scenic Tour | Destination, Scenic Tour, Wilderness |
| Total ascent | 0 m | 428 m |
| Climbing density | 0.0 m/km | 42.1 m/km |
| Total descent | 0 m | 428 m |
| Net elevation | -0 m | 0 m |
| Max absolute grade | 1.7% | 48.6% |
| Flat grade share | 100.0% | 24.3% |
| GAP factor | 0.0% | Unavailable |
| Cutoff | Unavailable | 4:00:00 |
| Entry model | Open | Open |
Schedule
- Summer Breeze Half Marathon (San Leandro) 10K
Exact race date not confirmed. Event weekend starts 2026-08-01 (legacy event-level date).
- Dalmacija Ultra Trail 10K
Exact race date not confirmed. Event weekend starts 2026-10-09 (legacy event-level date).
Location
- Summer Breeze Half Marathon (San Leandro) 10K
- San Leandro, California
- Dalmacija Ultra Trail 10K
- Omiš, Croatia
Actual distance
- Summer Breeze Half Marathon (San Leandro) 10K
- 10 km
- Dalmacija Ultra Trail 10K
- 10.2 km
raceindex.org mapped route held
- Summer Breeze Half Marathon (San Leandro) 10K
- Held
- Dalmacija Ultra Trail 10K
- Held
raceindex.org elevation profile held
- Summer Breeze Half Marathon (San Leandro) 10K
- Held
- Dalmacija Ultra Trail 10K
- Held
Course type
- Summer Breeze Half Marathon (San Leandro) 10K
- Out And Back
- Dalmacija Ultra Trail 10K
- Point To Point
Surface
- Summer Breeze Half Marathon (San Leandro) 10K
- Paved bayside trail (Marina Bay Trail / San Leandro Marina shoreline path).
- Dalmacija Ultra Trail 10K
- Mountain trail and rocky coastal paths
Elevation character
- Summer Breeze Half Marathon (San Leandro) 10K
- Unavailable
- Dalmacija Ultra Trail 10K
- Hilly
Terrain
- Summer Breeze Half Marathon (San Leandro) 10K
- Trail
- Dalmacija Ultra Trail 10K
- Beach, Trail
Scenery
- Summer Breeze Half Marathon (San Leandro) 10K
- Coastal, Waterfront, Parkland
- Dalmacija Ultra Trail 10K
- Coastal, Riverside, City, Mountain, Forest, Canyon, Historic, Island, Waterfront
Atmosphere
- Summer Breeze Half Marathon (San Leandro) 10K
- Community, Scenic Tour
- Dalmacija Ultra Trail 10K
- Destination, Scenic Tour, Wilderness
Total ascent
- Summer Breeze Half Marathon (San Leandro) 10K
- 0 m
- Dalmacija Ultra Trail 10K
- 428 m
Climbing density
- Summer Breeze Half Marathon (San Leandro) 10K
- 0.0 m/km
- Dalmacija Ultra Trail 10K
- 42.1 m/km
Total descent
- Summer Breeze Half Marathon (San Leandro) 10K
- 0 m
- Dalmacija Ultra Trail 10K
- 428 m
Net elevation
- Summer Breeze Half Marathon (San Leandro) 10K
- -0 m
- Dalmacija Ultra Trail 10K
- 0 m
Max absolute grade
- Summer Breeze Half Marathon (San Leandro) 10K
- 1.7%
- Dalmacija Ultra Trail 10K
- 48.6%
Flat grade share
- Summer Breeze Half Marathon (San Leandro) 10K
- 100.0%
- Dalmacija Ultra Trail 10K
- 24.3%
GAP factor
- Summer Breeze Half Marathon (San Leandro) 10K
- 0.0%
- Dalmacija Ultra Trail 10K
- Unavailable
Cutoff
- Summer Breeze Half Marathon (San Leandro) 10K
- Unavailable
- Dalmacija Ultra Trail 10K
- 4:00:00
Entry model
- Summer Breeze Half Marathon (San Leandro) 10K
- Open
- Dalmacija Ultra Trail 10K
- Open
Facts are shown only when they exist in the sourced race record; Not held means no sourced value is held for that race.