Beacons Way Ultra 100 Mile.
The Beacons Way Ultra 100 Mile crosses Bannau Brycheiniog from Abergavenny Castle to the rugby club in Llangadog, and finding the way is your job: map-and-compass ability is mandatory. Preparing for it means getting ready for nearly 6,000 metres of climbing, and for a head that still has to navigate cleanly after many hours on the move.
Beacons Way Ultra 100 Mile 2027: Course, Elevation & Route Profile
From the castle in Abergavenny the route heads west, and the first 45 kilometres already set out the pattern of the race: five climbs of about 300 metres each through the Black Mountains, with the trail dropping back to around 100 metres between them. The checkpoints at the Skirrid Inn, Llanthony and Crickhowell Parish Hall all sit inside this opening, which would pass as a hard mountain marathon by itself.
Via Bwlch you reach the Talybont car park after 74 kilometres, and the climb into the central Beacons begins straight behind it. Over 250 metres of ascent come in the first kilometre and a half, and around kilometre 80 Pen-y-Fan, at 886 metres, is the highest summit of the day. Beyond Storey Arms the course rolls over Sarn Helen to the caving club at Penn Wylt.
The last big block belongs to the Carmarthen Fans. From kilometre 110 the route gains 530 metres in one go, drops to Llandeusant and immediately climbs another 375 metres. After that it loses height almost steadily for 30 kilometres, and the end is not a summit but the rugby club in Llangadog, a few metres below where you started. Lower alternative routes exist for severe weather.
| Start | Length | Ø | Max. | Gain | Cat. |
|---|---|---|---|---|---|
| km 5.4 | 2.3 km | 11.7 % | 27.8 % | +270 m | Cat. 3 |
| km 12.8 | 3.7 km | 9.1 % | 20.4 % | +334 m | Cat. 2 |
| km 22.4 | 1.9 km | 15.1 % | 26.9 % | +291 m | Cat. 3 |
| km 28.7 | 3.2 km | 10.1 % | 26.2 % | +324 m | Cat. 2 |
| km 42.9 | 2.5 km | 12 % | 19.8 % | +295 m | Cat. 3 |
| km 74.1 | 1.5 km | 17.6 % | 36.4 % | +255 m | Cat. 3 |
| km 110.2 | 4.4 km | 12.1 % | 36.4 % | +530 m | Cat. 2 |
| km 124.4 | 3 km | 12.5 % | 24.9 % | +375 m | Cat. 2 |
Climb categories follow the road-cycling convention and rate the terrain itself (length and gradient) regardless of sport: Cat. 4 marks the easiest rated climbs, Cat. 1 the hardest, and HC (hors catégorie, “beyond categorization”) is reserved for the most brutal ascents. Short climbs below the Cat. 4 threshold stay unrated.
How to pace Beacons Way Ultra 100 Mile.
Start under control
Only about a tenth of this course is flat, while more than a third is steep, up or down. No steady running rhythm exists here, so you pace by effort: walk the steep ramps from the very start, even when your legs offer more. Use Talybont as the yardstick. Arriving there relaxed puts almost half the distance behind you, but not yet the hardest part.
Hold your rhythm
The race is decided between Penn Wylt and the top of the climb beyond Llandeusant. The 530 metres from kilometre 110 are costly, yet the descent that follows is the greater danger: some 550 metres down on already tired quads, with the next climb coming without a break. Take that descent more gently than feels right.
Spend what is left
The main trap is speed and navigation together. The first two checkpoints come quickly and invite you to push on, and later every route error costs kilometres you do not have spare. Stop briefly and check the map wherever the way is unclear. Refill properly at Mountain View, because the 26 kilometres from there to the finish have no further checkpoint.
Training plan for Beacons Way Ultra 100 Mile: 12-week build
Build the base
Plan on very roughly 30 to 45 hours, which means at least one night out and two for many starters. The effort stays aerobic and low almost throughout, but steep climbs you will hike keep interrupting it. Climbing strength therefore counts for more here than your running speed on the flat.
Train race pace
The decisive phases arrive late: 500 metres of ascent in one go after more than 100 kilometres, and long descents on tired legs. Build in back-to-back days with plenty of climbing, treat the second day as the key session, and put the steepest work at the end. Going downhill under fatigue needs sessions of its own, because your quads settle the second half of this race.
Rehearse the course
Navigation is a training discipline here like any other. Practise map and compass outdoors rather than at a desk, including at night and at the end of long sessions, when your thinking slows down. If parts of the Beacons Way are within reach, cover them on foot, especially the Carmarthen Fans and the final stretch towards Llangadog, which you will meet very tired on race day.
Arrive fresh
Ten checkpoints sound like plenty of support, but the gaps between them vary widely. Use long sessions to practise eating and drinking from your pack over several hours. The race is held in July, yet the severe-weather routes show you need to be ready for both ends of the range: test your night and foul-weather kit before you need it on Pen-y-Fan.
Courses
Download the Beacons Way Ultra 100 Mile course as a GPX file for your watch or bike computer.
Let YOUB adapt your plan for Beacons Way Ultra 100 Mile dynamically
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Everything about Beacons Way Ultra 100 Mile.
How long is Beacons Way Ultra 100 Mile?
Beacons Way Ultra 100 Mile is 160.93 km long. That distance shapes how much aerobic endurance, pace durability, and race-specific work belong in the training plan.
How much elevation gain does Beacons Way Ultra 100 Mile have?
Beacons Way Ultra 100 Mile has around 5,964 m of elevation gain over 160.93 km. That affects pacing, muscular load, and preparation for late-race sections.
What is the route profile of Beacons Way Ultra 100 Mile?
Beacons Way Ultra 100 Mile is classified as Mountainous, averaging 36.9 vertical metres per kilometre. 11% of the route is flat, 29% climbs moderately (2 to 6%) and 17% is steeper than 6%.
What climbs does Beacons Way Ultra 100 Mile have?
The hardest climb of Beacons Way Ultra 100 Mile starts at kilometre 110.2, runs for 4.4 km at an average of 12.1% and gains 530 metres. Cycling-convention rating: Cat. 2. 8 climbs are mapped in total.
Is Beacons Way Ultra 100 Mile a loop course?
No, Beacons Way Ultra 100 Mile is a point-to-point course: start and finish are in different places.
Is there a GPX file for the Beacons Way Ultra 100 Mile course?
Yes. The Beacons Way Ultra 100 Mile course is on this page as a free GPX download — ready to import into Garmin, Wahoo, Komoot, Strava or any other app that reads GPX.
How should I prepare for Beacons Way Ultra 100 Mile?
Preparation for Beacons Way Ultra 100 Mile should account for 160.93 km, 5,964 m of elevation gain, current training load, and available training time. An adaptive plan helps place key sessions without ignoring recovery and real life.
What pacing strategy works for Beacons Way Ultra 100 Mile?
The pacing strategy for Beacons Way Ultra 100 Mile should reflect 160.93 km, 5,964 m of elevation gain, and your current fitness. Start controlled and keep margin for sections where the profile or fatigue makes target pace harder.
When does Beacons Way Ultra 100 Mile 2027 take place?
Beacons Way Ultra 100 Mile 2027 takes place on July 24, 2027.
Where does Beacons Way Ultra 100 Mile 2027 take place?
Beacons Way Ultra 100 Mile 2027 takes place in Abergavenny, United Kingdom.
How do I register for Beacons Way Ultra 100 Mile?
Registration runs through the organiser: gbultras.com. YOUB shows you the course, elevation profile and training plan for your preparation.
