Flat grade share
- Summer Breeze Half Marathon (San Leandro)
- 100.0% Favoured
Summer Breeze Half Marathon (San Leandro) vs Goodyear Half Marathon & 10K (Akron)
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) or Goodyear Half Marathon & 10K (Akron) — which comes out ahead?
Summer Breeze Half Marathon (San Leandro) has the stronger available profile on flat grade share, course flatness and conditions.
Route comparison snapshot
Summer Breeze Half Marathon (San Leandro)
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.0% Favoured
- flat grade share
- 100.0% Favoured
- lower ascent
- 0 m
- climbing density
- 0.0 m/km
- net elevation
- -0 m
- maximum grade
- 1.8%
Goodyear Half Marathon & 10K (Akron)
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.2%
- flat grade share
- 85.6%
- lower ascent
- 109 m
- climbing density
- 5.2 m/km
- net elevation
- -9 m
- maximum grade
- 12.7%
| Metric | Summer Breeze Half Marathon (San Leandro) | Goodyear Half Marathon & 10K (Akron) |
|---|---|---|
| Flat grade share | 100.0% ✓ | 85.6% |
| GAP factor (% slower than flat) | 0.0% ✓ | 0.2% |
| Uphill share | 0.0% | 7.4% |
| Steep-up share | 0.0% | 0.8% |
| Downhill share | 0.0% | 7.0% |
| Total ascent (m) | 0 m | 109 m |
| Climbing density (m/km) | 0.0 m/km | 5.2 m/km |
| Longest climb length (m) | 330 m | 1,150 m |
| Longest climb gain (m) | 1 m | 24 m |
| Longest climb average grade | 0.3% | 2.1% |
| Total descent (m) | 0 m | 119 m |
| Net elevation (m) | -0 m | -9 m |
| Max absolute grade | 1.8% | 12.7% |
| Start elevation (m) | 2 m | 316 m |
| Finish elevation (m) | 2 m | 307 m |
| Scenic score | 57/100 | 61/100 ✓ |
| Conditions | 73/100 ✓ | 48/100 |
GAP factor (% slower than flat)
- Summer Breeze Half Marathon (San Leandro)
- 0.0% Favoured
Uphill share
Steep-up share
Downhill share
Total ascent (m)
Climbing density (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
- Goodyear Half Marathon & 10K (Akron)
- 61/100 Favoured
Conditions
- Summer Breeze Half Marathon (San Leandro)
- 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) | Goodyear Half Marathon & 10K (Akron) |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-08-01 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-08-08 (legacy event-level date). |
| Location | San Leandro, California | Akron, Ohio |
| Actual distance | 21.1 km | 21.1 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Out And Back | Loop |
| Surface | Paved bayside trail (Marina Bay Trail / San Leandro Marina shoreline path). | Predominantly paved asphalt and concrete streets, with a start on the Proving Grounds test track. |
| Elevation character | Pancake Flat | Gently Rolling |
| Terrain | Mixed, Trail | Road, Trail |
| Scenery | Coastal, Waterfront, Parkland | Waterfront, Countryside, Historic, City |
| Atmosphere | Community, Scenic Tour | Community |
| Technicality | Non Technical | Non Technical |
| Total ascent | 0 m | 109 m |
| Climbing density | 0.0 m/km | 5.2 m/km |
| Total descent | 0 m | 119 m |
| Net elevation | -0 m | -9 m |
| Max absolute grade | 1.8% | 12.7% |
| Flat grade share | 100.0% | 85.6% |
| GAP factor | 0.0% | 0.2% |
| Cutoff | Unavailable | 3:30:00 |
| Entry model | Open | Open |
Schedule
- Summer Breeze Half Marathon (San Leandro)
Exact race date not confirmed. Event weekend starts 2026-08-01 (legacy event-level date).
- Goodyear Half Marathon & 10K (Akron)
Exact race date not confirmed. Event weekend starts 2026-08-08 (legacy event-level date).
Location
- Summer Breeze Half Marathon (San Leandro)
- San Leandro, California
- Goodyear Half Marathon & 10K (Akron)
- Akron, Ohio
Actual distance
- Summer Breeze Half Marathon (San Leandro)
- 21.1 km
- Goodyear Half Marathon & 10K (Akron)
- 21.1 km
raceindex.org mapped route held
- Summer Breeze Half Marathon (San Leandro)
- Held
- Goodyear Half Marathon & 10K (Akron)
- Held
raceindex.org elevation profile held
- Summer Breeze Half Marathon (San Leandro)
- Held
- Goodyear Half Marathon & 10K (Akron)
- Held
Course type
- Summer Breeze Half Marathon (San Leandro)
- Out And Back
- Goodyear Half Marathon & 10K (Akron)
- Loop
Surface
- Summer Breeze Half Marathon (San Leandro)
- Paved bayside trail (Marina Bay Trail / San Leandro Marina shoreline path).
- Goodyear Half Marathon & 10K (Akron)
- Predominantly paved asphalt and concrete streets, with a start on the Proving Grounds test track.
Elevation character
- Summer Breeze Half Marathon (San Leandro)
- Pancake Flat
- Goodyear Half Marathon & 10K (Akron)
- Gently Rolling
Terrain
- Summer Breeze Half Marathon (San Leandro)
- Mixed, Trail
- Goodyear Half Marathon & 10K (Akron)
- Road, Trail
Scenery
- Summer Breeze Half Marathon (San Leandro)
- Coastal, Waterfront, Parkland
- Goodyear Half Marathon & 10K (Akron)
- Waterfront, Countryside, Historic, City
Atmosphere
- Summer Breeze Half Marathon (San Leandro)
- Community, Scenic Tour
- Goodyear Half Marathon & 10K (Akron)
- Community
Technicality
- Summer Breeze Half Marathon (San Leandro)
- Non Technical
- Goodyear Half Marathon & 10K (Akron)
- Non Technical
Total ascent
- Summer Breeze Half Marathon (San Leandro)
- 0 m
- Goodyear Half Marathon & 10K (Akron)
- 109 m
Climbing density
- Summer Breeze Half Marathon (San Leandro)
- 0.0 m/km
- Goodyear Half Marathon & 10K (Akron)
- 5.2 m/km
Total descent
- Summer Breeze Half Marathon (San Leandro)
- 0 m
- Goodyear Half Marathon & 10K (Akron)
- 119 m
Net elevation
- Summer Breeze Half Marathon (San Leandro)
- -0 m
- Goodyear Half Marathon & 10K (Akron)
- -9 m
Max absolute grade
- Summer Breeze Half Marathon (San Leandro)
- 1.8%
- Goodyear Half Marathon & 10K (Akron)
- 12.7%
Flat grade share
- Summer Breeze Half Marathon (San Leandro)
- 100.0%
- Goodyear Half Marathon & 10K (Akron)
- 85.6%
GAP factor
- Summer Breeze Half Marathon (San Leandro)
- 0.0%
- Goodyear Half Marathon & 10K (Akron)
- 0.2%
Cutoff
- Summer Breeze Half Marathon (San Leandro)
- Unavailable
- Goodyear Half Marathon & 10K (Akron)
- 3:30:00
Entry model
- Summer Breeze Half Marathon (San Leandro)
- Open
- Goodyear Half Marathon & 10K (Akron)
- 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) or Goodyear Half Marathon & 10K (Akron)?
Summer Breeze Half Marathon (San Leandro) has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.