Summer Breeze Half Marathon (San Leandro) 10K vs Vale of York Half Marathon 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 Vale of York Half Marathon 10K — which comes out ahead?
Summer Breeze Half Marathon (San Leandro) 10K has the stronger available profile on course flatness, scenery score and conditions.
Route comparison snapshot
Summer Breeze Half Marathon (San Leandro) 10K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.0% Favoured
- flat grade share
- 100.0%
- lower ascent
- 0 m
- climbing density
- 0.0 m/km
- net elevation
- -0 m
- maximum grade
- 1.7%
Vale of York Half Marathon 10K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.0%
- flat grade share
- 100.0%
- lower ascent
- 8 m
- climbing density
- 0.8 m/km
- net elevation
- -0 m
- maximum grade
- 1.0%
| Metric | Summer Breeze Half Marathon (San Leandro) 10K | Vale of York Half Marathon 10K |
|---|---|---|
| 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 | 8 m |
| Climbing density (m/km) | 0.0 m/km | 0.8 m/km |
| Longest climb length (m) | 640 m | 500 m |
| Longest climb gain (m) | 1 m | 2 m |
| Longest climb average grade | 0.1% | 0.5% |
| Total descent (m) | 0 m | 8 m |
| Net elevation (m) | -0 m | -0 m |
| Max absolute grade | 1.7% | 1.0% |
| Start elevation (m) | 2 m | 8 m |
| Finish elevation (m) | 2 m | 8 m |
| Value | Unavailable | 86/100 |
| Scenic score | 57/100 ✓ | 43/100 |
| Conditions | 73/100 ✓ | 72/100 |
| Entry fee (GBP) | Unavailable | £21 |
| Lowest modelled true cost (GBP) | Unavailable | £151 |
GAP factor (% slower than flat)
- Summer Breeze Half Marathon (San Leandro) 10K
- 0.0% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
- Vale of York Half Marathon 10K
- 0.8 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)
Value
Scenic score
- Summer Breeze Half Marathon (San Leandro) 10K
- 57/100 Favoured
Conditions
- Summer Breeze Half Marathon (San Leandro) 10K
- 73/100 Favoured
Entry fee (GBP)
Lowest modelled true cost (GBP)
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 | Vale of York Half Marathon 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 2026-09-13 (legacy event-level date). |
| Location | San Leandro, California | Wistow, Yorkshire |
| Actual distance | 10 km | 10 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Out And Back | Unavailable |
| Surface | Paved bayside trail (Marina Bay Trail / San Leandro Marina shoreline path). | Unavailable |
| Elevation character | Unavailable | Pancake Flat |
| Terrain | Trail | Road |
| Scenery | Coastal, Waterfront, Parkland | Countryside, Parkland, Forest |
| Atmosphere | Community, Scenic Tour | Community |
| Total ascent | 0 m | 8 m |
| Climbing density | 0.0 m/km | 0.8 m/km |
| Total descent | 0 m | 8 m |
| Net elevation | -0 m | -0 m |
| Max absolute grade | 1.7% | 1.0% |
| Flat grade share | 100.0% | 100.0% |
| GAP factor | 0.0% | 0.0% |
| Entry model | Open | Open |
| Entry fee | Unavailable | £21 |
| Lowest modelled true cost | Unavailable | £151 |
| Cost model origin | Unavailable | National Average |
| Measured course | Unavailable | Yes |
Schedule
- Summer Breeze Half Marathon (San Leandro) 10K
Exact race date not confirmed. Event weekend starts 2026-08-01 (legacy event-level date).
- Vale of York Half Marathon 10K
Exact race date not confirmed. Event weekend starts 2026-09-13 (legacy event-level date).
Location
- Summer Breeze Half Marathon (San Leandro) 10K
- San Leandro, California
- Vale of York Half Marathon 10K
- Wistow, Yorkshire
Actual distance
- Summer Breeze Half Marathon (San Leandro) 10K
- 10 km
- Vale of York Half Marathon 10K
- 10 km
raceindex.org mapped route held
- Summer Breeze Half Marathon (San Leandro) 10K
- Held
- Vale of York Half Marathon 10K
- Held
raceindex.org elevation profile held
- Summer Breeze Half Marathon (San Leandro) 10K
- Held
- Vale of York Half Marathon 10K
- Held
Course type
- Summer Breeze Half Marathon (San Leandro) 10K
- Out And Back
- Vale of York Half Marathon 10K
- Unavailable
Surface
- Summer Breeze Half Marathon (San Leandro) 10K
- Paved bayside trail (Marina Bay Trail / San Leandro Marina shoreline path).
- Vale of York Half Marathon 10K
- Unavailable
Elevation character
- Summer Breeze Half Marathon (San Leandro) 10K
- Unavailable
- Vale of York Half Marathon 10K
- Pancake Flat
Terrain
- Summer Breeze Half Marathon (San Leandro) 10K
- Trail
- Vale of York Half Marathon 10K
- Road
Scenery
- Summer Breeze Half Marathon (San Leandro) 10K
- Coastal, Waterfront, Parkland
- Vale of York Half Marathon 10K
- Countryside, Parkland, Forest
Atmosphere
- Summer Breeze Half Marathon (San Leandro) 10K
- Community, Scenic Tour
- Vale of York Half Marathon 10K
- Community
Total ascent
- Summer Breeze Half Marathon (San Leandro) 10K
- 0 m
- Vale of York Half Marathon 10K
- 8 m
Climbing density
- Summer Breeze Half Marathon (San Leandro) 10K
- 0.0 m/km
- Vale of York Half Marathon 10K
- 0.8 m/km
Total descent
- Summer Breeze Half Marathon (San Leandro) 10K
- 0 m
- Vale of York Half Marathon 10K
- 8 m
Net elevation
- Summer Breeze Half Marathon (San Leandro) 10K
- -0 m
- Vale of York Half Marathon 10K
- -0 m
Max absolute grade
- Summer Breeze Half Marathon (San Leandro) 10K
- 1.7%
- Vale of York Half Marathon 10K
- 1.0%
Flat grade share
- Summer Breeze Half Marathon (San Leandro) 10K
- 100.0%
- Vale of York Half Marathon 10K
- 100.0%
GAP factor
- Summer Breeze Half Marathon (San Leandro) 10K
- 0.0%
- Vale of York Half Marathon 10K
- 0.0%
Entry model
- Summer Breeze Half Marathon (San Leandro) 10K
- Open
- Vale of York Half Marathon 10K
- Open
Entry fee
- Summer Breeze Half Marathon (San Leandro) 10K
- Unavailable
- Vale of York Half Marathon 10K
- £21
Lowest modelled true cost
- Summer Breeze Half Marathon (San Leandro) 10K
- Unavailable
- Vale of York Half Marathon 10K
- £151
Cost model origin
- Summer Breeze Half Marathon (San Leandro) 10K
- Unavailable
- Vale of York Half Marathon 10K
- National Average
Measured course
- Summer Breeze Half Marathon (San Leandro) 10K
- Unavailable
- Vale of York Half Marathon 10K
- Yes
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, Summer Breeze Half Marathon (San Leandro) 10K or Vale of York Half Marathon 10K?
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.