July 12, 2025
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Eryri (Snowdonia) National Park
XTERRA Trail Run World Championship

Snowdonia Trail Half Marathon Eryri

Open Trail Half Marathon

RUN 21K
Note
The information on this page is not yet confirmed, and may be based on the previous years' edition.

XTERRA Snowdonia Trail Marathon Eryri Open Trail Half Marathon is the perfect combination of technicity, speed, fun and enjoyment set in the magnificent location with its varying terrain and mountains. Compete for the satisfaction of conquering the trail and earning your slot for the XTERRA Trail Run World Championship.

Registration opens on
Nov 19
Registration Closes on
Jul 11
Registration Closed

COURSE MAPS

This courses below are not yet confirmed, and subject to change.
Run Course
This is one tough Half Marathon with over 1192m of ascent most of which is up Wales’ highest peak.
Close
This is one tough Half Marathon with over 1192m of ascent most of which is up Wales’ highest peak. The hills start almost immediately as you climb up through Llanberis and then Maesgwm, also known as Telegraph Valley. Turning left onto the Snowdon Ranger Path you have a further steep climb up before crossing the railway, reaching the Finger Stone and starting your descent down the Llanberis Path. The views are incredible all the way to Anglesey, but don’t get complacent you haven’t finished yet. Once back down at the road in Llanberis you are diverted through the woods past Dolbadarn Castle with the sting in the tail being the final climb up the infamous Zig Zag path and into the quarries. Reaching the top of Vivian Quarry you’ll be able to see the event village and the finish line down below and better yet, its pretty much all down hill to the finish from here.

sChedule

This schedule is not yet confirmed, and subject to change.
1
Fri 2025.07.11
+
2
Sat 2025.07.12
+

prizes

This information is not yet confirmed, and subject to change.

116

TRWC Slots

Eco Medal

Welsh Slate Finisher Memento

Trail Run World Championship Slots Men & Women

DIVISION SLOTS

15-19

2

20-24

4

25-29

4

30-34

6

35-39

6

DIVISION SLOTS

40-44

6

45-49

6

50-54

6

55-59

4

60-64

4

DIVISION SLOTS

65-69

4

70-74

2

75-79

2

80+

2

Trail Run World Championship Slots Men & Women

DIVISION SLOTS

15-19

2

20-24

4

25-29

4

30-34

6

35-39

6

40-44

6

45-49

6

DIVISION SLOTS

50-54

6

55-59

4

60-64

4

65-69

4

70-74

2

75-79

2

80+

2

Slots indicated apply equally to male and female divisions. See the complete rules here.

We hold a prize-giving ceremony after the racing, approximate timings will be detailed in the Final Instructions however it is a good idea to listen out for information on any updates that come in over the tannoy. Sometimes the ceremony may be delayed and we wouldn't want you to miss out. We don't send out prizes after the event, so make sure you attend the ceremony and receive your big Welsh cheer!

Prize Categories for the Snowdonia Ultra Trail Marathon are (for both men and women)

Overall: Top 3*

Senior: 1st Runner

V40: 1st Runner

V50: 1st runner

V60: 1st runner

V70: 1st runner

All prizes must be collected on the day.

* If any runner places in Overall and a category, then a drop-down system will occur.

FEES

The fees below have not yet been confirmed, and are subject to change.
Registration from Aug 23rd, 2024 - Jul 10th, 2025.

RACE FEES

Description Fee
Early Bird - Tier 1 £ 39.99
Tier 2 £44.99
Tier 3 £47.99
Late Entries - Tier 4 £49.99

If you opted for a postal entry there is no need to register in person before the event. Your Final Instructions will be printed on the back of your bib, and they will also be available on the website 10 days prior to the race.

If your bib is not being posted you will need to collect it from registration. Registration will take place on Saturday afternoon and before the race on Sunday morning. We will confirm specific times in your Final Instructions, which will be available on the website and via email 10 days prior to the race.

Registration is usually located on the event field in Llanberis situated next to the Community Centre - LL55 4UR

RULES & INFO

The information below may be from a previous edition of the event, and is subject to change.

Minimum age: 17

CUT-OFF TIME:

14:30 - Mile 11 - Zig Zags roundabout feed station

FEED STATIONS:
Water and High 5 energy drink and gels will be available at 2 and 11 miles.

There will be an emergency water station at mile 7 (Clogwyn Station).
There will be limited supply here so please only take water if absolutely necessary. We are unable to re-fill water containers at this point.

COMPULSORY KIT:

All competitors must carry the compulsory kit listed below. This kit is for your safety due to the often unpredictable and quickly changing mountain conditions and isolated nature of the route.

Spot checks will be in place and anybody found without the required kit will not be allowed to race.

  • Waterproof jacket & trousers - with taped seams and integrated attached hood.

  • Suitable off-road running shoes - fell/trail shoes

  • Hat and Gloves (head and hand cover)

  • Whistle

  • Emergency food

  • Foil blanket

  • Drinking water

  • Mobile telephone

ADDITIONAL PERMITTED / ADVISORY KIT:

  • GPS device (watch with route downloaded)

  • Extra long-sleeved warm layer

  • Compass & map (If you know how to use them)

  • Poles (we permit people to use poles)

  • Suntan lotion


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