Flat grade share
- Summer Breeze Half Marathon (San Leandro) 10K
- 100.0% Favoured
Summer Breeze Half Marathon (San Leandro) 10K vs La Jolla Half Marathon, 10K & 5K
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 La Jolla Half Marathon, 10K & 5K — which comes out ahead?
La Jolla Half Marathon, 10K & 5K 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%
- flat grade share
- 100.0% Favoured
- lower ascent
- 0 m
- climbing density
- 0.0 m/km
- net elevation
- -0 m
- maximum grade
- 1.7%
La Jolla Half Marathon, 10K & 5K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- -4.5% Favoured
- flat grade share
- 56.0%
- lower ascent
- 76 m
- climbing density
- 7.6 m/km
- net elevation
- -121 m
- maximum grade
- 12.4%
| Metric | Summer Breeze Half Marathon (San Leandro) 10K | La Jolla Half Marathon, 10K & 5K |
|---|---|---|
| Flat grade share | 100.0% ✓ | 56.0% |
| GAP factor (% slower than flat) | 0.0% | -4.5% ✓ |
| Uphill share | 0.0% | 11.3% |
| Steep-up share | 0.0% | 1.8% |
| Downhill share | 0.0% | 32.6% |
| Total ascent (m) | 0 m | 76 m |
| Climbing density (m/km) | 0.0 m/km | 7.6 m/km |
| Longest climb length (m) | 640 m | 630 m |
| Longest climb gain (m) | 1 m | 25 m |
| Longest climb average grade | 0.1% | 4.0% |
| Total descent (m) | 0 m | 197 m |
| Net elevation (m) | -0 m | -121 m |
| Max absolute grade | 1.7% | 12.4% |
| Start elevation (m) | 2 m | 132 m |
| Finish elevation (m) | 2 m | 10 m |
| Scenic score | 57/100 | 73/100 ✓ |
| Conditions | 73/100 | 76/100 ✓ |
GAP factor (% slower than flat)
- La Jolla Half Marathon, 10K & 5K
- -4.5% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (m/km)
- La Jolla Half Marathon, 10K & 5K
- 7.6 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
- La Jolla Half Marathon, 10K & 5K
- 73/100 Favoured
Conditions
- La Jolla Half Marathon, 10K & 5K
- 76/100 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 | La Jolla Half Marathon, 10K & 5K |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-08-01 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2027-05-15 (legacy event-level date). |
| Location | San Leandro, California | La Jolla, San Diego, California |
| 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 | Net Downhill |
| Terrain | Trail | Road |
| Scenery | Coastal, Waterfront, Parkland | Forest, Coastal, Waterfront, Parkland, City |
| Atmosphere | Community, Scenic Tour | Scenic Tour, Destination, Competitive |
| Total ascent | 0 m | 76 m |
| Climbing density | 0.0 m/km | 7.6 m/km |
| Total descent | 0 m | 197 m |
| Net elevation | -0 m | -121 m |
| Max absolute grade | 1.7% | 12.4% |
| Flat grade share | 100.0% | 56.0% |
| GAP factor | 0.0% | -4.5% |
| 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).
- La Jolla Half Marathon, 10K & 5K
Exact race date not confirmed. Event weekend starts 2027-05-15 (legacy event-level date).
Location
- Summer Breeze Half Marathon (San Leandro) 10K
- San Leandro, California
- La Jolla Half Marathon, 10K & 5K
- La Jolla, San Diego, California
Actual distance
- Summer Breeze Half Marathon (San Leandro) 10K
- 10 km
- La Jolla Half Marathon, 10K & 5K
- 10 km
raceindex.org mapped route held
- Summer Breeze Half Marathon (San Leandro) 10K
- Held
- La Jolla Half Marathon, 10K & 5K
- Held
raceindex.org elevation profile held
- Summer Breeze Half Marathon (San Leandro) 10K
- Held
- La Jolla Half Marathon, 10K & 5K
- Held
Course type
- Summer Breeze Half Marathon (San Leandro) 10K
- Out And Back
- La Jolla Half Marathon, 10K & 5K
- Unavailable
Surface
- Summer Breeze Half Marathon (San Leandro) 10K
- Paved bayside trail (Marina Bay Trail / San Leandro Marina shoreline path).
- La Jolla Half Marathon, 10K & 5K
- Unavailable
Elevation character
- Summer Breeze Half Marathon (San Leandro) 10K
- Unavailable
- La Jolla Half Marathon, 10K & 5K
- Net Downhill
Terrain
- Summer Breeze Half Marathon (San Leandro) 10K
- Trail
- La Jolla Half Marathon, 10K & 5K
- Road
Scenery
- Summer Breeze Half Marathon (San Leandro) 10K
- Coastal, Waterfront, Parkland
- La Jolla Half Marathon, 10K & 5K
- Forest, Coastal, Waterfront, Parkland, City
Atmosphere
- Summer Breeze Half Marathon (San Leandro) 10K
- Community, Scenic Tour
- La Jolla Half Marathon, 10K & 5K
- Scenic Tour, Destination, Competitive
Total ascent
- Summer Breeze Half Marathon (San Leandro) 10K
- 0 m
- La Jolla Half Marathon, 10K & 5K
- 76 m
Climbing density
- Summer Breeze Half Marathon (San Leandro) 10K
- 0.0 m/km
- La Jolla Half Marathon, 10K & 5K
- 7.6 m/km
Total descent
- Summer Breeze Half Marathon (San Leandro) 10K
- 0 m
- La Jolla Half Marathon, 10K & 5K
- 197 m
Net elevation
- Summer Breeze Half Marathon (San Leandro) 10K
- -0 m
- La Jolla Half Marathon, 10K & 5K
- -121 m
Max absolute grade
- Summer Breeze Half Marathon (San Leandro) 10K
- 1.7%
- La Jolla Half Marathon, 10K & 5K
- 12.4%
Flat grade share
- Summer Breeze Half Marathon (San Leandro) 10K
- 100.0%
- La Jolla Half Marathon, 10K & 5K
- 56.0%
GAP factor
- Summer Breeze Half Marathon (San Leandro) 10K
- 0.0%
- La Jolla Half Marathon, 10K & 5K
- -4.5%
Entry model
- Summer Breeze Half Marathon (San Leandro) 10K
- Open
- La Jolla Half Marathon, 10K & 5K
- 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, Summer Breeze Half Marathon (San Leandro) 10K or La Jolla Half Marathon, 10K & 5K?
La Jolla Half Marathon, 10K & 5K has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.