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100 Mile Grand Slam

Name: 100 Mile Grand Slam
Start: 2027-05-01
End: 2027-10-17
Location: Worthing

Worthing, United Kingdom • 1-17 May-Oct 2027

The 100 Mile Grand Slam will take place in Worthing from Saturday 1 May 2027 to Sunday 17 October 2027. You can run 100 miles. Visit the organization's website for the most recent information.

United Kingdom South East (England) Worthing

Race information

Registration

100 mi

Thames Path 100

100 mi

Autumn 100

100 mi

North Downs Way 100

100 mi

South Downs Way 100

Visit the organization's website for the most recent information.

Trail runs nearby

Sunday May 17

Pulborough Vineyards Run

...

Off-road multi lap run at Nutbourne Vineyards with views to the South Downs. Choose distances from 5 km up to a half marathon on the day; entry is £29, places are limited to 100, and finishers receive a medal, drink and cake.

Sunday May 17

Mud Monsters Run

East Grinstead

Mud Run / Obstacle Run

3 km

5 km

10 km

Mud Monsters Run on 17 May 2026 in East Grinstead is a muddy obstacle event with 3 km, 5 km and 10 km routes through fields, woods and river crossings. Finishers get a medal and free photos; onsite parking costs £5.

Sunday May 17

Three Beaks Trail Running Day

Three Beaks Trail Running Day offers three self supported trail routes from Beak Brewery in Lewes on 17 May 2026. Routes are unmarked but run leaders guide groups and each finish includes a complimentary drink.

Sunday May 17

Phoenix - Dragon's Eye Race 1

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Dragon's Eye Race 1 2026 at Hurtwood Park Estate offers looped off road laps over mostly flat trails with a seven hour time limit. Participants can run from 5 km up to ultra distance and receive a bespoke finishers' medal.