Petworth, United Kingdom · Saturday, July 4, 2026

Fixed Distance 50K

Serpent Trail Race 50km

Race completed
50 km Distance
700 m Climbing
3.6 Grit · Challenging
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50.9867° N, 0.6100° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 14 m / km Fast & Flat. This course is relatively flat and fast. Ideal for PB attempts.
Time limit 16 hours 19:12 min/km average. Generous. Walkable throughout for most of the field. Among the most forgiving 50K cut-offs we track. Measured against 982 races of the same distance. Cut-off calculator →
Field size ~445 Large. Rarely out of sight of another runner.

DUV results for the 2026 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, July

Daytime high 22°C
Night low 13°C
Rainfall Mostly dry
Daylight 16 h 26 m of light

Regional 2001-2020 average for July — NASA POWER, grid elevation 51 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a fast & flat course. Expect fast, runnable sections where rhythm is key.

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 50 km of trail with 700 m of ascent.

  • Trail Running Shoes 50 km of trail — cushioning that is still there in the last quarter.
  • Race Nutrition 50 km of self-supported fuelling between aid stations.
  • Hydration Vests Flask capacity for 50 km, without the bounce.
  • Headlamps A 16 h limit puts you out there after dark.
  • GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.

Salomon

Sense Ride 5

★★★★★ 4.5

La Sportiva

Prodigio Pro

$225 ★★★★★ 4.6

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

The Serpent Trail 50k is half of the southern section of the trail, starting just outside Petworth and finishing in Petersfield via a mix of paths and tracks on generally sandy trails that dry well, plus short sections of road.

Similar races

Other 50K trail ultras, closest in distance first.