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