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About RaceIndexOur methodologyData coverageCyclingTriathlon
  • Half Marathon
  • 21.1 km
  • Lancing
  • Event weekend starts
  • Open entry

Three Forts Challenge Half Marathon

This race edition

Race date
Date not confirmed for this distance
Race timezone
Timezone not confirmed
Edition status
Status not confirmed

Entry options

2027 edition

Entry options are not yet confirmed for this edition. Check the organiser before making plans.

Modelled energy-cost change 3.3% versus flat · net elevation 0 m

View verified GPS mapOfficial event website & entry ↗
Plan my trainingPlan my paceData current as of

Decision summary

Three Forts Challenge Half Marathon at a glance

Route ascent
463 m

Lower than 13% of comparable mapped races

Typical conditions
65/100

Historical race-date favourability, not a forecast

Evidence depth
24 verified facts

Stored GPS route

Quick answers

What runners ask first

Three Forts Challenge Half Marathon route map

raceindex.org has a GPS course file for Three Forts Challenge Half Marathon, so runners can inspect the route line on the map. Elevation charts and ascent figures appear only when that file includes usable elevation data.

How hilly is the Three Forts Challenge Half Marathon?

The Three Forts Challenge Half Marathon route has 463 m of ascent, 463 m of descent and an estimated 3.3% grade-adjusted pace penalty versus a flat route.

Where does the Three Forts Challenge Half Marathon route go?

The Three Forts Challenge Half Marathon route starts at Lancing Manor Leisure Centre, Manor Road, Lancing, West Sussex, BN15 0PH and finishes at Lancing Manor Leisure Centre, Manor Road, Lancing, West Sussex, BN15 0PH. Underfoot, expect a trail course. The setting includes countryside and historic. the 5 Mile Trail Run is open to those aged 16 and over.

What should runners know on race day for the Three Forts Challenge Half Marathon?

5.

Race character

Scenery

  • Countryside
  • Historic
  • Coastal
  • Riverside

Atmosphere

  • Community
  • Charity
  • Scenic Tour

Terrain

  • Trail
Elevation character
Hilly

Entry, logistics and records

Entry requirements

Entry status
Open entry: The held registration model is open entry and this edition is not marked sold out.

Race day logistics

Aid stations
5

Access and course status

Start
Lancing Manor Leisure Centre, Manor Road, Lancing, West Sussex, BN15 0PH
Finish
Lancing Manor Leisure Centre, Manor Road, Lancing, West Sussex, BN15 0PH

Course facts

Notable features
  • Known affectionately as 'The Tough One'
  • All profits from the race go to Ferring Country Centre and other local Sussex charities
  • Marathon and half marathon are open to runners aged 18 and over
  • the 5 Mile Trail Run is open to those aged 16 and over

How hilly is the Three Forts Challenge Half Marathon?

12%23%29%23%12%
  • Steep descent 12%
  • Descent 23%
  • Flat 29%
  • Climb 23%
  • Steep climb 12%
Total ascent
463 m
Net elevation
+0 m
GAP factor
3.3%
Longest climb
1,690 m at 5.9%
Gradient mix and ascent are derived from the course geometry under our published normalisation, not taken from organiser marketing.

What are typical race-day conditions?

  • 17°CTypical temperature
  • 16 kphTypical wind
  • 5 mmTypical rainfall
  • 65Favourability /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.

More race details

Is the Three Forts Challenge Half Marathon flat?

Its normalised GAP factor is 3.3% slower than a flat course, with about 463 m of total ascent.

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 →