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About RaceIndexOur methodologyData coverageCyclingTriathlon
  • 10K
  • 10 km
  • Newcastle
  • Event weekend starts
  • Open entry

Tollymore Extreme (Tollymore Trail Marathon), Newcastle 10K

This race edition

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

Entry options

2026 edition

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

Modelled energy-cost change 3.2% versus flat · net elevation 2 m

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

Decision summary

Tollymore Extreme (Tollymore Trail Marathon), Newcastle 10K at a glance

Route ascent
189 m

Lower than 15% of comparable mapped races

Typical conditions
48/100

Historical race-date favourability, not a forecast

Evidence depth
30 verified facts

Stored GPS route

Quick answers

What runners ask first

Tollymore Extreme (Tollymore Trail Marathon), Newcastle 10K route map

raceindex.org has a GPS course file for Tollymore Extreme (Tollymore Trail Marathon), Newcastle 10K, 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 Tollymore Extreme (Tollymore Trail Marathon), Newcastle 10K?

The Tollymore Extreme (Tollymore Trail Marathon), Newcastle 10K route has 189 m of ascent, 187 m of descent and an estimated 3.2% grade-adjusted pace penalty versus a flat route.

Where does the Tollymore Extreme (Tollymore Trail Marathon), Newcastle 10K route go?

The Tollymore Extreme (Tollymore Trail Marathon), Newcastle 10K route starts at Tollymore Forest Park, Bryansford, Newcastle, Co. Down. Underfoot, expect mostly forest gravel road/service tracks (often rutted from rain, with leaf litter, fallen branches and mud) plus one short, slippery single-track section. It passes Shimna River, stepping stones, Parnell's Bridge, the Hermitage and Foley's Bridge. Organised by 26 Extreme, Northern Ireland's leading off-road event company (established 2009).

What should runners know on race day for the Tollymore Extreme (Tollymore Trail Marathon), Newcastle 10K?

Autumn-colour timing in early-mid November.

Race character

Scenery

  • Riverside
  • Countryside
  • Mountain
  • Forest
  • Historic
  • Parkland
  • Coastal

Terrain

  • Road

Entry, logistics and records

Records and field

Field size
300 places across all distances

Entry requirements

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

Access and course status

Start
Tollymore Forest Park, Bryansford, Newcastle, Co. Down

Course facts

Course type
Laps
Surface
Mostly forest gravel road/service tracks (often rutted from rain, with leaf litter, fallen branches and mud) plus one short, slippery single Track section.
Landmarks
Shimna River, stepping stones, Parnell's Bridge, the Hermitage, Foley's Bridge, Mourne Mountains views, Irish Sea views
Notable features
  • Organised by 26 Extreme, Northern Ireland's leading off-road event company (established 2009). Plastic-free, leave-no-trace environmental policy with reusable, discreet course signage
  • Tollymore Forest Park is a noted filming location (Game of Thrones, Dungeons & Dragons)
  • Summit climbs reward runners with views across the Mourne Mountains and the Irish Sea
  • autumn-colour timing in early-mid November

How hilly is the Tollymore Extreme (Tollymore Trail Marathon), Newcastle 10K?

12%20%32%25%11%
  • Steep descent 12%
  • Descent 20%
  • Flat 32%
  • Climb 25%
  • Steep climb 11%
Total ascent
189 m
Net elevation
+2 m
GAP factor
3.2%
Longest climb
1,110 m at 4.0%
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?

  • 20°CTypical temperature
  • 23 kphTypical wind
  • 3 mmTypical rainfall
  • 48Favourability /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 Tollymore Extreme (Tollymore Trail Marathon), Newcastle 10K flat?

Its normalised GAP factor is 3.2% slower than a flat course, with about 189 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 →