Saint Helier, United Kingdom · Saturday, August 1, 2026

Fixed Distance 50 mi

Round the Rock Jersey 48 Miles

Race completed
77 km Distance
4,500 m Climbing
10.0 Grit · Elite / extreme
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51.3895° N, 0.1989° W© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 58 m / km Mountain. Significant climbing. Steep sections will require power hiking.
Time limit 12 hours 9:21 min/km average. Comfortable. Room to walk the climbs and stop at aid. Tighter than 82% of 50 mi races. Measured against 455 races of the same distance. Cut-off calculator →
Field size ~95 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2024 edition (48mi) — 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 22°C
Night low 12°C
Rainfall Mostly dry
Daylight 15 h 27 m of light

Regional 2001-2020 average for August — NASA POWER, grid elevation 73 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a mountain course. Poles are highly recommended for the sustained climbs.

By UltraHub Expert
👟 gear

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

By UltraHub Expert

Gear for this race

Chosen for 77 km of trail with 4,500 m of ascent.

Adidas

Terrex Speed Ultra

★★★★★ 4.5

Adidas

Terrex Agravic Speed Ultra

★★★★★ 4.5

Skratch Labs

Sport Hydration Mix

Clean electrolyte drink mix with real fruit flavor. Low sugar.

$20 ★★★★★ 4.5

Nathan

VaporKrar 12L

12L race vest co-designed with ultra champion Rob Krar, with insulated bladder pocket.

$170 ★★★★★ 4.6

LEKI

Ultratrail FX.One

Ultra-light carbon folding poles (135g each) designed for mountain ultra racing.

$200 ★★★★★ 4.6

Nitecore

UT32

Dual-beam trail running headlamp (1100 lumens) with spot and flood beams.

$100 ★★★★★ 4.5
All gear guides →

Course Notes

Around the Island of Jersey, Channel Islands, UK. At approximately 48 miles (77Km) and 1000 metres of ascent this race will circle around the island following the stunning granite cliffs of the North Coast.

Similar races

Other 50 mi trail ultras, closest in distance first.