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About RaceIndexOur methodologyData coverageCyclingTriathlon

Two Tunnels Railway Races

  • Bath
  • South West
  • Mixed
Data current as of

Official event website ↗

Same event — which distance suits you?

DistanceAscentClimb densityDescentNet elevationMax absolute gradeGAP factorFee
Ultramarathon1,231 m24.6 m/km1,229 m2 m17.3%5.6%£65
Marathon415 m9.8 m/km413 m2 m21.0%2.0%£60
Half Marathon489 m23.2 m/km487 m2 m18.1%5.4%£46
10K244 m24.4 m/km241 m2 m18.1%5.8%£32
5K51 m10.2 m/km49 m2 m8.6%1.0%£26

Ultramarathon

Ascent
1,231 m
Climb density
24.6 m/km
Descent
1,229 m
Net elevation
2 m
Max absolute grade
17.3%
GAP factor
5.6%
Fee
£65

Marathon

Ascent
415 m
Climb density
9.8 m/km
Descent
413 m
Net elevation
2 m
Max absolute grade
21.0%
GAP factor
2.0%
Fee
£60

Half Marathon

Ascent
489 m
Climb density
23.2 m/km
Descent
487 m
Net elevation
2 m
Max absolute grade
18.1%
GAP factor
5.4%
Fee
£46

10K

Ascent
244 m
Climb density
24.4 m/km
Descent
241 m
Net elevation
2 m
Max absolute grade
18.1%
GAP factor
5.8%
Fee
£32

5K

Ascent
51 m
Climb density
10.2 m/km
Descent
49 m
Net elevation
2 m
Max absolute grade
8.6%
GAP factor
1.0%
Fee
£26

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 Two Tunnels Railway Races offer?

Two Tunnels Railway Races offers Ultramarathon, Marathon, Half Marathon, 10K, 5K, all run from the same event.

Typical conditions on race weekend

  • 17°CTypical temperature
  • 22 kphTypical wind
  • 3 mmTypical rainfall
  • 62Favourability /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, entry fees, cost estimates, race-day conditions, and source facts are shown on this event page. Sections appear only when their source-backed data is available.