50K ultra runs in South East

Find 50k ultra runs near me in South East for 2025/2026 - filter by date or location, display on a map or use the advanced search to find your perfect race.

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Scenic mixed-terrain route around Bewl Water on undulating rural wooded trails and quiet country lanes. The marathon course was previously rated one of the top UK marathons.

Sat 13 Sep
£60-£62

Sat 13 Sep
£60-£62

Wadhurst, East Sussex, UK

Bewl Water Autumn | Ultra

Scenic mixed-terrain route around Bewl Water on undulating rural wooded trails and quiet country lanes. The marathon course was previously rated one of the top UK marathons.

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Hilly
Age 20-80

50 km trail running + 1500 ft ascent

The second half option of the Thames Path Challenge from Runnymede along the meandering river through Cookham to Henley-on-Thames, home of the regatta, to a celebration finish and family BBQ!

Sat 13 - Sun 14 Sep
£139

Sat 13 - Sun 14 Sep
£139

Egham, Surrey, UK

Thames Path Ultra Challenge | 2nd Half

The second half option of the Thames Path Challenge from Runnymede along the meandering river through Cookham to Henley-on-Thames, home of the regatta, to a celebration finish and family BBQ!

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Flat
Age 18 & over

50 km trail running + 150 m ascent

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The full 50K route of the Chiltern 50 Ultra Challenge starts from basecamp in Henley on a loop via Greys Court, the Ridgeway, Shakespeare's Way, The Chilterns and Hambleden Village to a party finish!

Sat 27 Sep
£139
Entries close soon

Sat 27 Sep
£139
Entries close soon

Henley-on-Thames, Buckinghamshire, UK

Chiltern 50 Ultra Challenge | Full 50km

The full 50K route of the Chiltern 50 Ultra Challenge starts from basecamp in Henley on a loop via Greys Court, the Ridgeway, Shakespeare's Way, The Chilterns and Hambleden Village to a party finish!

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Undulating
Age 18 & over

50 km trail running + 920 m ascent

Set in an Area of Outstanding Natural Beauty offering dramatic views, vibrant communities, a rich historic heritage, and diverse wildlife and habitats – featuring the North Downs Way National Trail.

Sat 11 Oct
£139
6 charities

Sat 11 Oct
£139
6 charities

Maidstone, Kent, UK

Kent Downs 50 Ultra Challenge | 50km

Set in an Area of Outstanding Natural Beauty offering dramatic views, vibrant communities, a rich historic heritage, and diverse wildlife and habitats – featuring the North Downs Way National Trail.

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Undulating
Age 16 & over

50 km trail running + 1000 m ascent

Flat and runnable without skimping on scenery, it offers spectacular views around Chichester Harbour, through the ancient fishing village of Bosham before gently climbing back onto the South Downs.

Sat 20 Jun 2026
£75
4 charities

Sat 20 Jun 2026
£75
4 charities

Chichester, West Sussex, UK

Race to the King | Coastal 50K

Flat and runnable without skimping on scenery, it offers spectacular views around Chichester Harbour, through the ancient fishing village of Bosham before gently climbing back onto the South Downs.

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Undulating
Age 18 & over

50 km trail running + 461 m ascent

The ideal ‘next step’ on your ultra journey! Following an undulating course along the South Downs Way, the route passes by Arundel Castle before returning to West Dean via the Monarch's Way.

Sat 20 Jun 2026
£75
4 charities

Sat 20 Jun 2026
£75
4 charities

Chichester, West Sussex, UK

Race to the King | Castle 50K

The ideal ‘next step’ on your ultra journey! Following an undulating course along the South Downs Way, the route passes by Arundel Castle before returning to West Dean via the Monarch's Way.