6

100K ultra runs in South East

Find 100k ultra runs near me in South East for 2025/2026 - search by date or place, display on a map or use the advanced search to find your perfect race.

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The full distance option of the South Coast Challenge from sunny Eastbourne, over the magnificent Seven Sisters, onto Cuckmere Haven and over the South Downs all the way to historic Arundel.
  • Sat 6 - Sun 7 Sep
  • £199
  • 14 charities
  • Sat 6 - Sun 7 Sep
  • £199
  • 14 charities
Polegate, East Sussex, UK

South Coast Ultra Challenge | Full 100km continuous

The full distance option of the South Coast Challenge from sunny Eastbourne, over the magnificent Seven Sisters, onto Cuckmere Haven and over the South Downs all the way to historic Arundel.

  • Chip timing
  • Enter online
  • GPS tracking
  • Hilly
  • Age 18 & over
  • 100 km trail running + 2100 m ascent
The full distance option of the South Coast Challenge over 2 days with 57km on day 1 and 43km on day 2, meaning you experience the route in daylight with the chance to sleep overnight.
  • Sat 6 - Sun 7 Sep
  • £199
  • 13 charities
  • Sat 6 - Sun 7 Sep
  • £199
  • 13 charities
Polegate, East Sussex, UK

South Coast Ultra Challenge | Full 100km over 2 days

The full distance option of the South Coast Challenge over 2 days with 57km on day 1 and 43km on day 2, meaning you experience the route in daylight with the chance to sleep overnight.

  • Chip timing
  • Enter online
  • GPS tracking
  • Hilly
  • Age 18 & over
  • 100 km trail running + 2100 m ascent
The full circuit takes in both the Coastal and Castle loops for a magnificent tour of the stunning South Downs. Steeped in history and uniquely varied, the 100K offers a course truly fit for royalty.
  • Sat 20 Jun 2026
  • £150
  • 3 charities
  • Sat 20 Jun 2026
  • £150
  • 3 charities
Chichester, West Sussex, UK

Race to the King | 100K Non-Stop

The full circuit takes in both the Coastal and Castle loops for a magnificent tour of the stunning South Downs. Steeped in history and uniquely varied, the 100K offers a course truly fit for royalty.

  • Chip timing
  • Enter online
  • GPS tracking
  • Undulating
  • Age 18 & over
  • 100 km trail running + 1510 m ascent
Explore the Ridgeway, Britain’s oldest road, along a remarkably isolated and unspoilt corner of Southern England with sweeping chalk downs, ancient forests and the Avebury Standing Stones.
  • Sat 11 Jul 2026
  • £175
  • 6 charities
  • Sat 11 Jul 2026
  • £175
  • 6 charities
Watlington, Oxfordshire, UK

Race to the Stones | 100K Non-stop

Explore the Ridgeway, Britain’s oldest road, along a remarkably isolated and unspoilt corner of Southern England with sweeping chalk downs, ancient forests and the Avebury Standing Stones.

  • Chip timing
  • Enter online
  • GPS tracking
  • Undulating
  • Age 18 & over
  • 100 km trail running + 3704 ft ascent
Explore the Ridgeway, Britain’s oldest road, along a remarkably isolated and unspoilt corner of Southern England with sweeping chalk downs, ancient forests and the Avebury Standing Stones.
  • Sat 11 Jul 2026
  • £245
  • 4 charities
  • Sat 11 Jul 2026
  • £245
  • 4 charities
Watlington, Oxfordshire, UK

Race to the Stones | 100K Over Two Days

Explore the Ridgeway, Britain’s oldest road, along a remarkably isolated and unspoilt corner of Southern England with sweeping chalk downs, ancient forests and the Avebury Standing Stones.

  • Chip timing
  • Enter online
  • GPS tracking
  • Undulating
  • Age 18 & over
  • 100 km trail running + 3704 ft ascent
Explore the Ridgeway, Britain’s oldest road, along a remarkably isolated and unspoilt corner of Southern England with sweeping chalk downs, ancient forests and the Avebury Standing Stones.
  • Sat 11 Jul 2026
  • £155
  • Sat 11 Jul 2026
  • £155
Watlington, Oxfordshire, UK

Race to the Stones | 100K Two Days no camping

Explore the Ridgeway, Britain’s oldest road, along a remarkably isolated and unspoilt corner of Southern England with sweeping chalk downs, ancient forests and the Avebury Standing Stones.

  • Chip timing
  • Enter online
  • GPS tracking
  • Undulating
  • Age 18 & over
  • 100 km trail running + 3704 ft ascent

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