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About RaceIndexOur methodologyData coverageCyclingTriathlon

St Albans Half Marathon

  • St Albans
  • East Of England
  • Parkland
Data current as of

Official event website & entry ↗

Same event — which distance suits you?

DistanceAscentClimb densityDescentNet elevationMax absolute gradeGAP factor
Half Marathon220 m10.4 m/km221 m0 m8.8%1.0%
10K97 m9.7 m/km97 m0 m6.9%1.0%
5K84 m16.8 m/km89 m-5 m8.9%1.7%

Half Marathon

Ascent
220 m
Climb density
10.4 m/km
Descent
221 m
Net elevation
0 m
Max absolute grade
8.8%
GAP factor
1.0%

10K

Ascent
97 m
Climb density
9.7 m/km
Descent
97 m
Net elevation
0 m
Max absolute grade
6.9%
GAP factor
1.0%

5K

Ascent
84 m
Climb density
16.8 m/km
Descent
89 m
Net elevation
-5 m
Max absolute grade
8.9%
GAP factor
1.7%

GAP is modelled energy-cost change versus flat, not a time penalty. Unavailable cells mean no sourced value is available yet. Click a distance for its full page.

Compare distances at this event

Same-event questions

What distances does St Albans Half Marathon offer?

St Albans Half Marathon offers Half Marathon, 10K, 5K, all run from the same event.

Typical conditions on race weekend

  • 15°CTypical temperature
  • 19 kphTypical wind
  • 3 mmTypical rainfall
  • 73Favourability /100
Typical conditions for the race date and locality, warmer than the endurance-optimal window. These are climatological norms, not a forecast, and are shared across every distance at this event.

Explore each distance

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 .

Derived numbers use scoring-methodology-v1.0.

Sources used on this page (3)

Read the full methodology →

Source-backed sections

available route profile, race-day conditions, and source facts are shown on this event page. Sections appear only when their source-backed data is available.