Flat grade share
- Chester Marathon
- 86.3% Favoured
- Chester Marathon 10K
- 79.5%
Chester Marathon vs Chester Marathon 10K
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofChester Marathon or Chester Marathon 10K — which comes out ahead?
Chester Marathon has the stronger available profile on flat grade share and course flatness.
Route comparison snapshot
Chester Marathon
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.3% Favoured
- flat grade share
- 86.3% Favoured
- lower ascent
- 220 m
- climbing density
- 5.2 m/km
- net elevation
- 3 m
- maximum grade
- 7.8%
Chester Marathon 10K
- Mapped route
- Held
- Elevation profile
- Held
- course flatness
- 0.9%
- flat grade share
- 79.5%
- lower ascent
- 60 m
- climbing density
- 6.0 m/km
- net elevation
- 11 m
- maximum grade
- 6.2%
| Metric | Chester Marathon | Chester Marathon 10K |
|---|---|---|
| Flat grade share | 86.3% ✓ | 79.5% |
| GAP factor (% slower than flat) | 0.3% ✓ | 0.9% |
| Uphill share | 6.7% | 11.8% |
| Steep-up share | 0.3% | 0.0% |
| Downhill share | 7.0% | 8.7% |
| Total ascent (m) | 220 m | 60 m |
| Climbing density (m/km) | 5.2 m/km | 6.0 m/km |
| Longest climb length (m) | 680 m | 840 m |
| Longest climb gain (m) | 25 m | 15 m |
| Longest climb average grade | 3.6% | 1.8% |
| Total descent (m) | 217 m | 50 m |
| Net elevation (m) | 3 m | 11 m |
| Max absolute grade | 7.8% | 6.2% |
| Start elevation (m) | 5 m | 14 m |
| Finish elevation (m) | 8 m | 25 m |
| Scenic score | 48/100 | 48/100 |
| Conditions | 83/100 | 83/100 |
GAP factor (% slower than flat)
- Chester Marathon
- 0.3% Favoured
Uphill share
- Chester Marathon
- 6.7%
- Chester Marathon 10K
- 11.8%
Steep-up share
- Chester Marathon
- 0.3%
Downhill share
- Chester Marathon
- 7.0%
Total ascent (m)
- Chester Marathon
- 220 m
Climbing density (m/km)
- Chester Marathon
- 5.2 m/km
- Chester Marathon 10K
- 6.0 m/km
Longest climb length (m)
- Chester Marathon
- 680 m
- Chester Marathon 10K
- 840 m
Longest climb gain (m)
- Chester Marathon
- 25 m
Longest climb average grade
- Chester Marathon
- 3.6%
Total descent (m)
- Chester Marathon
- 217 m
Net elevation (m)
Max absolute grade
- Chester Marathon
- 7.8%
Start elevation (m)
Finish elevation (m)
Scenic score
- Chester Marathon
- 48/100
- Chester Marathon 10K
- 48/100
Conditions
- Chester Marathon
- 83/100
- Chester Marathon 10K
- 83/100
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.
Same-distance comparisons are most meaningful; cross-distance metrics are contextual.
Race facts that change the decision
| Fact | Chester Marathon | Chester Marathon 10K |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2026-10-11 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2026-10-11 (legacy event-level date). |
| Location | Chester, North West | Chester, North West |
| Actual distance | 42.2 km | 10 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Held |
| Course type | Unavailable | Fast, flat, scenic city centre route |
| Surface | Road | Unavailable |
| Elevation character | Gently Rolling | Unavailable |
| Terrain | Road | Unavailable |
| Scenery | Riverside, Historic, City, Countryside | Riverside, City, Historic, Countryside |
| Atmosphere | Scenic Tour, Community | Scenic Tour, Community |
| Technicality | Non Technical | Unavailable |
| Total ascent | 220 m | 60 m |
| Climbing density | 5.2 m/km | 6.0 m/km |
| Total descent | 217 m | 50 m |
| Net elevation | 3 m | 11 m |
| Max absolute grade | 7.8% | 6.2% |
| Flat grade share | 86.3% | 79.5% |
| GAP factor | 0.3% | 0.9% |
| Cutoff | 6:00:00 | Unavailable |
| Entry model | Open | Open |
| Measured course | Yes | Unavailable |
| Qualifying status | Championship | Unavailable |
Schedule
- Chester Marathon
Exact race date not confirmed. Event weekend starts 2026-10-11 (legacy event-level date).
- Chester Marathon 10K
Exact race date not confirmed. Event weekend starts 2026-10-11 (legacy event-level date).
Location
- Chester Marathon
- Chester, North West
- Chester Marathon 10K
- Chester, North West
Actual distance
- Chester Marathon
- 42.2 km
- Chester Marathon 10K
- 10 km
raceindex.org mapped route held
- Chester Marathon
- Held
- Chester Marathon 10K
- Held
raceindex.org elevation profile held
- Chester Marathon
- Held
- Chester Marathon 10K
- Held
Course type
- Chester Marathon
- Unavailable
- Chester Marathon 10K
- Fast, flat, scenic city centre route
Surface
- Chester Marathon
- Road
- Chester Marathon 10K
- Unavailable
Elevation character
- Chester Marathon
- Gently Rolling
- Chester Marathon 10K
- Unavailable
Terrain
- Chester Marathon
- Road
- Chester Marathon 10K
- Unavailable
Scenery
- Chester Marathon
- Riverside, Historic, City, Countryside
- Chester Marathon 10K
- Riverside, City, Historic, Countryside
Atmosphere
- Chester Marathon
- Scenic Tour, Community
- Chester Marathon 10K
- Scenic Tour, Community
Technicality
- Chester Marathon
- Non Technical
- Chester Marathon 10K
- Unavailable
Total ascent
- Chester Marathon
- 220 m
- Chester Marathon 10K
- 60 m
Climbing density
- Chester Marathon
- 5.2 m/km
- Chester Marathon 10K
- 6.0 m/km
Total descent
- Chester Marathon
- 217 m
- Chester Marathon 10K
- 50 m
Net elevation
- Chester Marathon
- 3 m
- Chester Marathon 10K
- 11 m
Max absolute grade
- Chester Marathon
- 7.8%
- Chester Marathon 10K
- 6.2%
Flat grade share
- Chester Marathon
- 86.3%
- Chester Marathon 10K
- 79.5%
GAP factor
- Chester Marathon
- 0.3%
- Chester Marathon 10K
- 0.9%
Cutoff
- Chester Marathon
- 6:00:00
- Chester Marathon 10K
- Unavailable
Entry model
- Chester Marathon
- Open
- Chester Marathon 10K
- Open
Measured course
- Chester Marathon
- Yes
- Chester Marathon 10K
- Unavailable
Qualifying status
- Chester Marathon
- Championship
- Chester Marathon 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, Chester Marathon or Chester Marathon 10K?
Chester Marathon has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.