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About RaceIndexOur methodologyData coverageCyclingTriathlon

Girdwood Marathon

  • Girdwood
  • Alaska
  • Mixed
Data current as of

Official event website & entry ↗

Same event — which distance suits you?

DistanceAscentClimb densityDescentNet elevationMax absolute gradeGAP factor
Marathon1,076 m25.5 m/km1,073 m4 m34.7%6.8%
Half MarathonUnavailableUnavailableUnavailableUnavailableUnavailableUnavailable
5KUnavailableUnavailableUnavailableUnavailableUnavailableUnavailable

Marathon

Ascent
1,076 m
Climb density
25.5 m/km
Descent
1,073 m
Net elevation
4 m
Max absolute grade
34.7%
GAP factor
6.8%

Half Marathon

Ascent
Unavailable
Climb density
Unavailable
Descent
Unavailable
Net elevation
Unavailable
Max absolute grade
Unavailable
GAP factor
Unavailable

5K

Ascent
Unavailable
Climb density
Unavailable
Descent
Unavailable
Net elevation
Unavailable
Max absolute grade
Unavailable
GAP factor
Unavailable

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 Girdwood Marathon offer?

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

Typical conditions on race weekend

  • 6°CTypical temperature
  • 11 kphTypical wind
  • 9 mmTypical rainfall
  • 72Favourability /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.