Flat grade share
- Chelmsford Half Marathon 5K
- Unavailable
St Albans Half Marathon 5K vs Chelmsford Half Marathon 5K
A data-led head-to-head using sourced race facts and available derived figures under one published methodology.
Data current as ofSt Albans Half Marathon 5K or Chelmsford Half Marathon 5K — which comes out ahead?
St Albans Half Marathon 5K and Chelmsford Half Marathon 5K split the available advantages, so the better choice depends on which metric matters most to the runner.
Route comparison snapshot
St Albans Half Marathon 5K
- Mapped route
- Held
- Elevation profile
- Held Favoured
- course flatness
- 1.7%
- flat grade share
- 35.5%
- lower ascent
- 84 m
- climbing density
- 16.8 m/km
- net elevation
- -5 m
- maximum grade
- 8.9%
Chelmsford Half Marathon 5K
- Mapped route
- Held
- Elevation profile
- Not held
- course flatness
- Unavailable
- flat grade share
- Unavailable
- lower ascent
- Unavailable
- climbing density
- Unavailable
- net elevation
- Unavailable
- maximum grade
- Unavailable
| Metric | St Albans Half Marathon 5K | Chelmsford Half Marathon 5K |
|---|---|---|
| Flat grade share | 35.5% | Unavailable |
| GAP factor (% slower than flat) | 1.7% | Unavailable |
| Uphill share | 33.1% | Unavailable |
| Steep-up share | 7.6% | Unavailable |
| Downhill share | 31.4% | Unavailable |
| Total ascent (m) | 84 m | Unavailable |
| Climbing density (m/km) | 16.8 m/km | Unavailable |
| Longest climb length (m) | 740 m | Unavailable |
| Longest climb gain (m) | 29 m | Unavailable |
| Longest climb average grade | 3.9% | Unavailable |
| Total descent (m) | 89 m | Unavailable |
| Net elevation (m) | -5 m | Unavailable |
| Max absolute grade | 8.9% | Unavailable |
| Start elevation (m) | 82 m | Unavailable |
| Finish elevation (m) | 77 m | Unavailable |
| Scenic score | 60/100 ✓ | 5/100 |
| Conditions | 73/100 | 77/100 ✓ |
GAP factor (% slower than flat)
- Chelmsford Half Marathon 5K
- Unavailable
Uphill share
- Chelmsford Half Marathon 5K
- Unavailable
Steep-up share
- Chelmsford Half Marathon 5K
- Unavailable
Downhill share
- Chelmsford Half Marathon 5K
- Unavailable
Total ascent (m)
- Chelmsford Half Marathon 5K
- Unavailable
Climbing density (m/km)
- St Albans Half Marathon 5K
- 16.8 m/km
- Chelmsford Half Marathon 5K
- Unavailable
Longest climb length (m)
- Chelmsford Half Marathon 5K
- Unavailable
Longest climb gain (m)
- Chelmsford Half Marathon 5K
- Unavailable
Longest climb average grade
- Chelmsford Half Marathon 5K
- Unavailable
Total descent (m)
- Chelmsford Half Marathon 5K
- Unavailable
Net elevation (m)
- Chelmsford Half Marathon 5K
- Unavailable
Max absolute grade
- Chelmsford Half Marathon 5K
- Unavailable
Start elevation (m)
- Chelmsford Half Marathon 5K
- Unavailable
Finish elevation (m)
- Chelmsford Half Marathon 5K
- Unavailable
Scenic score
- St Albans Half Marathon 5K
- 60/100 Favoured
Conditions
- Chelmsford Half Marathon 5K
- 77/100 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 | St Albans Half Marathon 5K | Chelmsford Half Marathon 5K |
|---|---|---|
| Schedule | Exact race date not confirmed. Event weekend starts 2027-06-13 (legacy event-level date). | Exact race date not confirmed. Event weekend starts 2027-03-07 (legacy event-level date). |
| Location | St Albans, East Of England | Chelmsford, East Of England |
| Actual distance | 5 km | 5 km |
| raceindex.org mapped route held | Held | Held |
| raceindex.org elevation profile held | Held | Not held |
| Course type | Loop | Unavailable |
| Terrain | Trail | Road |
| Scenery | Parkland, Lakeside, Historic, Countryside | City |
| Atmosphere | Community, Festival | Community, Competitive |
| Total ascent | 84 m | Unavailable |
| Climbing density | 16.8 m/km | Unavailable |
| Total descent | 89 m | Unavailable |
| Net elevation | -5 m | Unavailable |
| Max absolute grade | 8.9% | Unavailable |
| Flat grade share | 35.5% | Unavailable |
| GAP factor | 1.7% | Unavailable |
| Field cap | 600 | Unavailable |
| Entry model | Open | Open |
Schedule
- St Albans Half Marathon 5K
Exact race date not confirmed. Event weekend starts 2027-06-13 (legacy event-level date).
- Chelmsford Half Marathon 5K
Exact race date not confirmed. Event weekend starts 2027-03-07 (legacy event-level date).
Location
- St Albans Half Marathon 5K
- St Albans, East Of England
- Chelmsford Half Marathon 5K
- Chelmsford, East Of England
Actual distance
- St Albans Half Marathon 5K
- 5 km
- Chelmsford Half Marathon 5K
- 5 km
raceindex.org mapped route held
- St Albans Half Marathon 5K
- Held
- Chelmsford Half Marathon 5K
- Held
raceindex.org elevation profile held
- St Albans Half Marathon 5K
- Held
- Chelmsford Half Marathon 5K
- Not held
Course type
- St Albans Half Marathon 5K
- Loop
- Chelmsford Half Marathon 5K
- Unavailable
Terrain
- St Albans Half Marathon 5K
- Trail
- Chelmsford Half Marathon 5K
- Road
Scenery
- St Albans Half Marathon 5K
- Parkland, Lakeside, Historic, Countryside
- Chelmsford Half Marathon 5K
- City
Atmosphere
- St Albans Half Marathon 5K
- Community, Festival
- Chelmsford Half Marathon 5K
- Community, Competitive
Total ascent
- St Albans Half Marathon 5K
- 84 m
- Chelmsford Half Marathon 5K
- Unavailable
Climbing density
- St Albans Half Marathon 5K
- 16.8 m/km
- Chelmsford Half Marathon 5K
- Unavailable
Total descent
- St Albans Half Marathon 5K
- 89 m
- Chelmsford Half Marathon 5K
- Unavailable
Net elevation
- St Albans Half Marathon 5K
- -5 m
- Chelmsford Half Marathon 5K
- Unavailable
Max absolute grade
- St Albans Half Marathon 5K
- 8.9%
- Chelmsford Half Marathon 5K
- Unavailable
Flat grade share
- St Albans Half Marathon 5K
- 35.5%
- Chelmsford Half Marathon 5K
- Unavailable
GAP factor
- St Albans Half Marathon 5K
- 1.7%
- Chelmsford Half Marathon 5K
- Unavailable
Field cap
- St Albans Half Marathon 5K
- 600
- Chelmsford Half Marathon 5K
- Unavailable
Entry model
- St Albans Half Marathon 5K
- Open
- Chelmsford Half Marathon 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.