St Albans Half Marathon 10K vs Norfolk Festival of Running (King's Lynn) 10K

Name: St Albans Half Marathon 10K vs Norfolk Festival of Running (King's Lynn) 10K comparison data
Creator: raceindex.org

St Albans Half Marathon 10K or Norfolk Festival of Running (King's Lynn) 10K — which comes out ahead?

St Albans Half Marathon 10K has the stronger available profile on flat grade share, course flatness and conditions.

Route comparison snapshot

St Albans Half Marathon 10K

Mapped route: Held
Elevation profile: Held
course flatness: 1.0% Favoured
flat grade share: 56.8% Favoured
lower ascent: 97 m
climbing density: 9.7 m/km
net elevation: 0 m
maximum grade: 6.9%

Norfolk Festival of Running (King's Lynn) 10K

Mapped route: Held
Elevation profile: Held
course flatness: 1.5%
flat grade share: 45.5%
lower ascent: 139 m
climbing density: 13.9 m/km
net elevation: -1 m
maximum grade: 9.8%

Head-to-head comparison
Metric	St Albans Half Marathon 10K	Norfolk Festival of Running (King's Lynn) 10K
Flat grade share	56.8% ✓	45.5%
GAP factor (% slower than flat)	1.0% ✓	1.5%
Uphill share	21.4%	27.3%
Steep-up share	3.6%	6.0%
Downhill share	21.7%	27.3%
Total ascent (m)	97 m	139 m
Climbing density (m/km)	9.7 m/km	13.9 m/km
Longest climb length (m)	1,120 m	140 m
Longest climb gain (m)	37 m	9 m
Longest climb average grade	3.3%	6.3%
Total descent (m)	97 m	139 m
Net elevation (m)	0 m	-1 m
Max absolute grade	6.9%	9.8%
Start elevation (m)	77 m	18 m
Finish elevation (m)	78 m	17 m
Value	Unavailable	85/100
Scenic score	60/100	65/100 ✓
Conditions	73/100 ✓	61/100
Entry fee (GBP)	Unavailable	£29
Lowest modelled true cost (GBP)	Unavailable	£159

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

Race facts comparison
Fact	St Albans Half Marathon 10K	Norfolk Festival of Running (King's Lynn) 10K
Schedule	Exact race date not confirmed. Event weekend starts 2027-06-13 (legacy event-level date).	Exact race date not confirmed. Event weekend starts 2026-07-12 (legacy event-level date).
Location	St Albans, East Of England	King's Lynn, East Of England
Actual distance	10 km	10 km
raceindex.org mapped route held	Held	Held
raceindex.org elevation profile held	Held	Held
Course type	Unavailable	Laps
Surface	Unavailable	Trail course over sand, gravel and grass
Terrain	Trail	Trail
Scenery	Parkland, Lakeside, Historic, Countryside	Parkland, Countryside, Lakeside, Forest
Atmosphere	Community, Festival	Festival, Community
Total ascent	97 m	139 m
Climbing density	9.7 m/km	13.9 m/km
Total descent	97 m	139 m
Net elevation	0 m	-1 m
Max absolute grade	6.9%	9.8%
Flat grade share	56.8%	45.5%
GAP factor	1.0%	1.5%
Field cap	2,500	Unavailable
Entry model	Open	Open
Entry fee	Unavailable	£29
Lowest modelled true cost	Unavailable	£159
Cost model origin	Unavailable	National Average

Schedule

St Albans Half Marathon 10K: Exact race date not confirmed. Event weekend starts 2027-06-13 (legacy event-level date).
Norfolk Festival of Running (King's Lynn) 10K: Exact race date not confirmed. Event weekend starts 2026-07-12 (legacy event-level date).

Location

St Albans Half Marathon 10K: St Albans, East Of England
Norfolk Festival of Running (King's Lynn) 10K: King's Lynn, East Of England

Actual distance

St Albans Half Marathon 10K: 10 km
Norfolk Festival of Running (King's Lynn) 10K: 10 km

raceindex.org mapped route held

St Albans Half Marathon 10K: Held
Norfolk Festival of Running (King's Lynn) 10K: Held

raceindex.org elevation profile held

St Albans Half Marathon 10K: Held
Norfolk Festival of Running (King's Lynn) 10K: Held

Course type

St Albans Half Marathon 10K: Unavailable
Norfolk Festival of Running (King's Lynn) 10K: Laps

Surface

St Albans Half Marathon 10K: Unavailable
Norfolk Festival of Running (King's Lynn) 10K: Trail course over sand, gravel and grass

Terrain

St Albans Half Marathon 10K: Trail
Norfolk Festival of Running (King's Lynn) 10K: Trail

Scenery

St Albans Half Marathon 10K: Parkland, Lakeside, Historic, Countryside
Norfolk Festival of Running (King's Lynn) 10K: Parkland, Countryside, Lakeside, Forest

Atmosphere

St Albans Half Marathon 10K: Community, Festival
Norfolk Festival of Running (King's Lynn) 10K: Festival, Community

Total ascent

St Albans Half Marathon 10K: 97 m
Norfolk Festival of Running (King's Lynn) 10K: 139 m

Climbing density

St Albans Half Marathon 10K: 9.7 m/km
Norfolk Festival of Running (King's Lynn) 10K: 13.9 m/km

Total descent

St Albans Half Marathon 10K: 97 m
Norfolk Festival of Running (King's Lynn) 10K: 139 m

Net elevation

St Albans Half Marathon 10K: 0 m
Norfolk Festival of Running (King's Lynn) 10K: -1 m

Max absolute grade

St Albans Half Marathon 10K: 6.9%
Norfolk Festival of Running (King's Lynn) 10K: 9.8%

Flat grade share

St Albans Half Marathon 10K: 56.8%
Norfolk Festival of Running (King's Lynn) 10K: 45.5%

GAP factor

St Albans Half Marathon 10K: 1.0%
Norfolk Festival of Running (King's Lynn) 10K: 1.5%

Field cap

St Albans Half Marathon 10K: 2,500
Norfolk Festival of Running (King's Lynn) 10K: Unavailable

Entry model

St Albans Half Marathon 10K: Open
Norfolk Festival of Running (King's Lynn) 10K: Open

Entry fee

St Albans Half Marathon 10K: Unavailable
Norfolk Festival of Running (King's Lynn) 10K: £29

Lowest modelled true cost

St Albans Half Marathon 10K: Unavailable
Norfolk Festival of Running (King's Lynn) 10K: £159

Cost model origin

St Albans Half Marathon 10K: Unavailable
Norfolk Festival of Running (King's Lynn) 10K: National Average

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, St Albans Half Marathon 10K or Norfolk Festival of Running (King's Lynn) 10K?

St Albans Half Marathon 10K has the lower GAP factor, making it the flatter course on our route model and more favourable on gradient alone.

Read the full pages

How figures are calculated →

How we calculated this

Published facts and derived model outputs on this page are tied to stored sources or a published, version-locked methodology. We show the provenance so runners, coaches and organisers can check it. Data on this page is current as of 2026-07-06.

Derived numbers use scoring-methodology-v1.0.

Sources used on this page (4)

Layer E archive-api.open-meteo.com
Layer A stalbanshalfmarathon.com · last check inconclusive on 2026-07-29
Layer B src_derived
Layer A zigzagrunning.co.uk · last check inconclusive on 2026-07-25

Read the full methodology →

St Albans Half Marathon 10K or Norfolk Festival of Running (King's Lynn) 10K — which comes out ahead?

Route comparison snapshot

St Albans Half Marathon 10K

Norfolk Festival of Running (King's Lynn) 10K

Flat grade share

GAP factor (% slower than flat)

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)

Value

Scenic score

Conditions

Entry fee (GBP)

Lowest modelled true cost (GBP)

Race facts that change the decision

Schedule

Location

Actual distance

raceindex.org mapped route held

raceindex.org elevation profile held

Course type

Surface

Terrain

Scenery

Atmosphere

Total ascent

Climbing density

Total descent

Net elevation

Max absolute grade

Flat grade share

GAP factor

Field cap

Entry model

Entry fee

Lowest modelled true cost

Cost model origin

Common questions

Which is flatter, St Albans Half Marathon 10K or Norfolk Festival of Running (King's Lynn) 10K?

Read the full pages