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www.sientries.co.uk

Mourne Mountain Marathon 26

United Kingdom flag
North West, United Kingdom

calendar_today 19 Sep, 2026 – 20 Sep, 2026

directions_run Running

language Official Website

sell £50.00 – £120.00

Register Now
Mourne Mountain Marathon 26

About the Event

The Mourne Mountain Marathon offers an unparalleled challenge for teams of two over the course of two days, blending navigation skills with endurance on the rugged terrain of Northern Ireland's Mourne Mountains. Participants are given a list of control points identified by six-figure Ordnance Survey map references at the start of each day and must navigate to these checkpoints in sequence while choosing their own routes.
Self-sufficiency is key as teams carry all necessary equipment for an overnight camp deep within the mountains, where they will spend one night camping under the stars. The atmosphere around the campfire is warm and welcoming, fostering a sense of camaraderie among competitors despite the grueling nature of the event. While basic in amenities, this experience offers breathtaking views that make every hardship worthwhile.
For those who cannot commit to the full two-day adventure but still wish to partake in the navigation challenge, there's also a 6-hour Score race available on Saturday. This condensed version allows participants to test their skills without the commitment of an overnight stay.
All teams are encouraged to use the Mourne Mountains 1:25,000 map published by Harvey Maps for optimal performance during the event. These maps can be purchased from most reputable outdoor retailers and online platforms.
Due to high demand, some options may require a vetting or waiting list process where no payment is necessary initially. If selected, participants will receive an email invitation with instructions on how to confirm their entry through our website. For detailed information about the registration process, please refer to our Vetting/Waiting List Help guide.
The Mourne Mountain Marathon promises not only a test of physical and mental strength but also a rewarding experience in one of Ireland's most scenic landscapes.

Races Offered

Adult & Junior (AJ) (per team)

Sep 19, 2026

straighten

Distance — Adult & Junior (AJ) (per team)

terrain

Type — Running

timer

66 days remaining

sell

£80.00

Pair (per team)

Sep 19, 2026

straighten

Distance — Pair (per team)

terrain

Type — Running

timer

66 days remaining

sell

£120.00

Score - Adult & Junior (AJ) (per team)

Sep 19, 2026

straighten

Distance — Score - Adult & Junior (AJ) (per team)

terrain

Type — Running

timer

66 days remaining

sell

£50.00

Score - Pair (per team)

Sep 19, 2026

straighten

Distance — Score - Pair (per team)

terrain

Type — Running

timer

66 days remaining

sell

£50.00

Score - Under 23 (per team)

Sep 19, 2026

straighten

Distance — Score - Under 23 (per team)

terrain

Type — Running

timer

66 days remaining

sell

£50.00

Under 23 (per team)

Sep 19, 2026

straighten

Distance — Under 23 (per team)

terrain

Type — Running

timer

66 days remaining

sell

£80.00

Weather History

These values represent the 3-year monthly averages for September in .

thermostat Temperature
9.6° / 15.7°
wb_sunny Feels like
6.7° / 13.1°
light_mode Avg sunshine hours
7h 42m
water_drop Avg rainfall
5.0 mm
ac_unit Avg snowfall
—
air Avg wind speed
14.8 km/h (Gentle breeze)
opacity Sweat loss rate
Low
terrain Course conditions
Firm and slightly soft
sunny Max UV Index
Moderate (3.5)
humidity_mid Humidity
84.8%
wb_twilight Sunrise
06:46
nightlight Sunset
19:28

Hotels & Places to Stay

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