Aberdyfi, United Kingdom · Saturday, August 15, 2026

Fixed Distance 50 mi

Run to the Castle Ultra

Race completed
68 km Distance
not publishedn/a Climbing
3.4 est Grit · Challenging

Calculated from 68 km alone — the organiser has not published an elevation profile. Read 3.4 as a floor, not a verdict.

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52.5451° N, 4.0534° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 12 hours 10:35 min/km average. Generous. Walkable throughout for most of the field. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. About average for a 50 mi. Measured against 445 races of the same distance. Cut-off calculator →
Field size ~25 Small. Long stretches with nobody in sight.

DUV results for the 2023 edition (42mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, August

Daytime high 18°C
Night low 11°C
Rainfall Showers likely
Daylight 14 h 48 m of light

Regional 2001-2020 average for August — NASA POWER, grid elevation 255 m. Not a forecast.

The Aid Station

Course-specific beta from the community

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

Gear for this race

Chosen for 68 km of trail.

  • Trail Running Shoes 68 km of trail — cushioning that is still there in the last quarter.
  • Race Nutrition 68 km of self-supported fuelling between aid stations.
  • Hydration Vests Flask capacity for 68 km, without the bounce.
  • Headlamps A 12 h limit puts you out there after dark.
  • GPS Watches Battery life first — a 68 km day outlasts most full-GPS modes.

Adidas

Terrex Agravic Speed Ultra

★★★★★ 4.5

Salomon

Sense Ride 5

★★★★★ 4.5

Spring Energy

Awesome Sauce

Real food gel with 180 calories. Rice-based with natural flavors.

$4 ★★★★★ 4.6

Salomon

ADV Skin 12

Industry-standard 12L race vest with front flask pockets and minimal bounce.

$180 ★★★★★ 4.8

Petzl

NAO RL

1500-lumen reactive lighting headlamp with 15-hour runtime. Automatic brightness adjustment.

$150 ★★★★★ 4.7

COROS

APEX 2 Pro

GPS running watch with 75-hour GPS battery, topo maps, and training metrics.

$500 ★★★★★ 4.7
All gear guides →

Course Notes

Run to the Castle will take runners and walkers from the coastal village of Aberdyfi (Aberdovey) up the beautiful coastal path, taking in the seafront at Tywyn, the village of Fairbourne, the famous Fairborne bridge, Barmouth, to the castle town of Harlec

Similar races

Other 50 mi trail ultras, closest in distance first.