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About RaceIndexOur methodologyData coverageCyclingTriathlon

Southampton Marathon

  • Southampton
  • South East
  • City
  • 10,000 runners across the weekend
Data current as of

Official event website & entry ↗

Same event — which distance suits you?

DistanceAscentClimb densityDescentNet elevationMax absolute gradeGAP factor
Marathon279 m6.6 m/km265 m14 m9.7%0.7%
Half Marathon151 m7.1 m/km136 m15 m12.4%1.0%
10K70 m7.0 m/km56 m14 m13.8%1.4%
5K26 m5.2 m/km12 m14 m4.3%1.7%

Marathon

Ascent
279 m
Climb density
6.6 m/km
Descent
265 m
Net elevation
14 m
Max absolute grade
9.7%
GAP factor
0.7%

Half Marathon

Ascent
151 m
Climb density
7.1 m/km
Descent
136 m
Net elevation
15 m
Max absolute grade
12.4%
GAP factor
1.0%

10K

Ascent
70 m
Climb density
7.0 m/km
Descent
56 m
Net elevation
14 m
Max absolute grade
13.8%
GAP factor
1.4%

5K

Ascent
26 m
Climb density
5.2 m/km
Descent
12 m
Net elevation
14 m
Max absolute grade
4.3%
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 Southampton Marathon offer?

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

Typical conditions on race weekend

  • 12°CTypical temperature
  • 20 kphTypical wind
  • 2 mmTypical rainfall
  • 87Favourability /100
Typical conditions for the race date and locality, within 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.