Vale of York Half Marathon 10K vs Summer Breeze Half Marathon (San Leandro) 10K
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofVale of York Half Marathon 10K or Summer Breeze Half Marathon (San Leandro) 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
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%
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%
| Metric | Vale of York Half Marathon 10K | Summer Breeze Half Marathon (San Leandro) 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) | 8 m | 0 m |
| Climbing density (m/km) | 0.8 m/km | 0.0 m/km |
| Longest climb length (m) | 500 m | 640 m |
| Longest climb gain (m) | 2 m | 1 m |
| Longest climb average grade | 0.5% | 0.1% |
| Total descent (m) | 8 m | 0 m |
| Net elevation (m) | -0 m | -0 m |
| Max absolute grade | 1.0% | 1.7% |
| Start elevation (m) | 8 m | 2 m |
| Finish elevation (m) | 8 m | 2 m |
| Value | 86/100 | Unavailable |
| Scenic score | 43/100 | 57/100 ✓ |
| Conditions | 72/100 | 73/100 ✓ |
| Entry fee (GBP) | £21 | Unavailable |
| Lowest modelled true cost (GBP) | £151 | Unavailable |
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 | Vale of York Half Marathon 10K | Summer Breeze Half Marathon (San Leandro) 10K |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-09-13 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-08-01 (legacy event-level date). |
| Location | Wistow, Yorkshire | San Leandro, California |
| Actual distance | 10 km | 10 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 | Pancake Flat | Unavailable |
| Terrain | Road | Trail |
| Scenery | Countryside, Parkland, Forest | Coastal, Waterfront, Parkland |
| Atmosphere | Community | Community, Scenic Tour |
| Total ascent | 8 m | 0 m |
| Climbing density | 0.8 m/km | 0.0 m/km |
| Total descent | 8 m | 0 m |
| Net elevation | -0 m | -0 m |
| Max absolute grade | 1.0% | 1.7% |
| Flat grade share | 100.0% | 100.0% |
| GAP factor | 0.0% | 0.0% |
| Entry model | Open | Open |
| Entry fee | £21 | Unavailable |
| Lowest modelled true cost | £151 | Unavailable |
| Cost model origin | National Average | Unavailable |
| Measured course | Yes | Unavailable |
Schedule
- Vale of York Half Marathon 10K
Exact race date not confirmed. Event weekend starts 2026-09-13 (legacy event-level date).
- Summer Breeze Half Marathon (San Leandro) 10K
Exact race date not confirmed. Event weekend starts 2026-08-01 (legacy event-level date).
Location
- Vale of York Half Marathon 10K
- Wistow, Yorkshire
- Summer Breeze Half Marathon (San Leandro) 10K
- San Leandro, California
Actual distance
- Vale of York Half Marathon 10K
- 10 km
- Summer Breeze Half Marathon (San Leandro) 10K
- 10 km
raceindex.org mapped route held
- Vale of York Half Marathon 10K
- Held
- Summer Breeze Half Marathon (San Leandro) 10K
- Held
raceindex.org elevation profile held
- Vale of York Half Marathon 10K
- Held
- Summer Breeze Half Marathon (San Leandro) 10K
- Held
Course type
- Vale of York Half Marathon 10K
- Unavailable
- Summer Breeze Half Marathon (San Leandro) 10K
- Out And Back
Surface
- Vale of York Half Marathon 10K
- Unavailable
- Summer Breeze Half Marathon (San Leandro) 10K
- Paved bayside trail (Marina Bay Trail / San Leandro Marina shoreline path).
Elevation character
- Vale of York Half Marathon 10K
- Pancake Flat
- Summer Breeze Half Marathon (San Leandro) 10K
- Unavailable
Terrain
- Vale of York Half Marathon 10K
- Road
- Summer Breeze Half Marathon (San Leandro) 10K
- Trail
Scenery
- Vale of York Half Marathon 10K
- Countryside, Parkland, Forest
- Summer Breeze Half Marathon (San Leandro) 10K
- Coastal, Waterfront, Parkland
Atmosphere
- Vale of York Half Marathon 10K
- Community
- Summer Breeze Half Marathon (San Leandro) 10K
- Community, Scenic Tour
Total ascent
- Vale of York Half Marathon 10K
- 8 m
- Summer Breeze Half Marathon (San Leandro) 10K
- 0 m
Climbing density
- Vale of York Half Marathon 10K
- 0.8 m/km
- Summer Breeze Half Marathon (San Leandro) 10K
- 0.0 m/km
Total descent
- Vale of York Half Marathon 10K
- 8 m
- Summer Breeze Half Marathon (San Leandro) 10K
- 0 m
Net elevation
- Vale of York Half Marathon 10K
- -0 m
- Summer Breeze Half Marathon (San Leandro) 10K
- -0 m
Max absolute grade
- Vale of York Half Marathon 10K
- 1.0%
- Summer Breeze Half Marathon (San Leandro) 10K
- 1.7%
Flat grade share
- Vale of York Half Marathon 10K
- 100.0%
- Summer Breeze Half Marathon (San Leandro) 10K
- 100.0%
GAP factor
- Vale of York Half Marathon 10K
- 0.0%
- Summer Breeze Half Marathon (San Leandro) 10K
- 0.0%
Entry model
- Vale of York Half Marathon 10K
- Open
- Summer Breeze Half Marathon (San Leandro) 10K
- Open
Entry fee
- Vale of York Half Marathon 10K
- £21
- Summer Breeze Half Marathon (San Leandro) 10K
- Unavailable
Lowest modelled true cost
- Vale of York Half Marathon 10K
- £151
- Summer Breeze Half Marathon (San Leandro) 10K
- Unavailable
Cost model origin
- Vale of York Half Marathon 10K
- National Average
- Summer Breeze Half Marathon (San Leandro) 10K
- Unavailable
Measured course
- Vale of York Half Marathon 10K
- Yes
- Summer Breeze Half Marathon (San Leandro) 10K
- Unavailable
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, Vale of York Half Marathon 10K or Summer Breeze Half Marathon (San Leandro) 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.