RunThrough Trails Brighton 50/50
Fifty miles or fifty kilometres from Brighton Marina.
| Distance | Ascent | Per km |
|---|---|---|
| 50 Mile | 1,624 m | 20 m |
| 50K | 1,138 m | 23 m |
| 23K | 478 m | 21 m |
Nobody has reviewed this one yet
No reviews of the Brighton 50/50, and nothing on what people wore. Both are things no organiser publishes and every runner wants before they enter — how it actually went, and what was on your feet.
Ran it? Write the first reviewRunning it soon? Connect Strava and we will ask you about it the day you finish, so you do not have to remember to come back.
Pick your distance
15h cut-off, which needs 11:11/km
8 checkpoints
What you’re in for
Starts at Black Rock by Brighton Marina and heads out on the South Downs Way, up the chalk escarpments and back along the cliff tops with the Channel beside you the whole way. Fifty miles with 1,624m of climb and fifteen hours, run solo or as a pair in relay; a 50K with 1,138m and ten hours; and a 23K with 478m that goes at ten in the morning with two aid stations and eight hours, which is the gentlest way in. Cupless aid, mandatory kit including a head torch for the long ones.
Terrain and trail
Chalk: flinty track along the South Downs Way, steep grassy climbs onto the escarpment, and cliff-top turf and tarmac on the way back along the coast. Fast when dry, slick when the chalk is wet, and exposed to the sea wind. Marked. A road shoe with tread or a light trail shoe.
Partner · affiliate policy
Aid stations
Two aid stations on the 23K.
Cut-offs
Eight hours on the 23K.
More from RunThrough Trails
Every RunThrough Trails race →Other races RunThrough Trails put on, soonest first.
17
Oct
2026
Carsington Water
Carsington Water, Ashbourne, Derbyshire · RunThrough Trails
Half marathon and 10k on the reservoir trail at Carsington Water, Derbyshire
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£30–£34
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2026
Delamere Forest
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Fast forest trails in Cheshire, twice a year.
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Jul
2027
Tittesworth Water
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Staffordshire moorland and the Roaches.
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1
Aug
2027
South Downs
Waterlooville, Hampshire · RunThrough Trails
The South Downs Way from Queen Elizabeth Country Park.
Entries open
7
Aug
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Brecon Beacons
Henderson Hall, Talybont-on-Usk, Powys · RunThrough Trails
Mountain trail from Talybont-on-Usk.
Entries open
no date
yet
Beat Box Hill
Box Hill, Surrey · RunThrough Trails
Surrey Hills repeats on the North Downs.
Other races near here
South Downs races →Races from other organisers starting within 30 km of Brighton, East Sussex, nearest first.
3
Apr
2027
The Maverick East Sussex Trail
Brighton, East Sussex · Maverick Race · 4 miles away
Stanmer Park and the South Downs Way.
MODERATE
Entries open
4
Apr
2027
The Brighton Trail Marathon
Brighton, East Sussex · Maverick Race · 4 miles away
Trail to road — the South Downs, then the Brighton Marathon finish.
VERY HARD
Entries open
28
Nov
2026
Sussex Downs Trail Run
Plumpton Racecourse, Lewes · UK Running Events · 8 miles away
Plumpton Racecourse up to the South Downs Way, 21.3k, 15.5k or 10.8k
MODERATE TO HARD
Not open yet
£34.5–£44.5
2
May
2027
Three Forts Challenge
Lancing Manor Leisure Centre, Manor Road, Lancing · Three Forts Challenge · 9 miles away
Hilly South Downs marathon, half and 5-miler past Cissbury and Chanctonbury
Not open yet
£20–£49
How to enter
No date announced for the next running yet. RunThrough Trails’s site ↗ is where it will show up first.
Common questions
- The Brighton 50/50 offers 3 distances: 50 Mile (80.5 km), 50K (31.1 miles), 23K (14.3 miles).